Mounjaro Dosage Chart: Every Dose, Week by Week

Disclosure: The RX Index has affiliate relationships with some providers discussed on this page. If you use a labeled partner link, The RX Index may earn a commission at no extra cost to you. It does not change what this page says. Every dose on this page comes from the FDA-approved label, not from a partner.

Last verified: August 7, 2026 · Based on the U.S. Mounjaro prescribing information, revised April 2026 · Dataset version 1.1

The Mounjaro dosage chart starts at 2.5 mg once a week for 4 weeks. Then it moves to 5 mg. After that, your doctor can raise the dose by 2.5 mg at a time — but never sooner than 4 weeks apart. The adult maximum is 15 mg a week. For patients age 10 through 17, the maximum is 10 mg.

That last number catches most people off guard. Mounjaro has two ceilings now, not one. The pediatric indication and 10 mg ceiling were approved on December 19, 2025. A chart built before that approval will show only the adult number unless it has been updated.

There's a second thing most charts blur, and it matters more. The label directs one scheduled increase: from 2.5 mg to 5 mg after four weeks. Everything above 5 mg is written as conditional. We'll show you the exact wording below, because it's the difference between "I'm behind schedule" and "I'm doing fine."

Primary verification: U.S. Mounjaro prescribing information, revised April 2026 and FDA pediatric approval letter, December 19, 2025.

Who this page is for

Read this if:

• You just got a Mounjaro prescription and want to see the whole road
• You're four weeks in and wondering what happens next
• You missed a shot, or you want to switch your injection day
• Your pharmacy handed you a different pen or vial than last time
• You're a parent or caregiver for someone age 10 or older

This page won't help if:

• You want to pick your own dose. We won't do that, and you should be suspicious of any site that will.
• You want Mounjaro for weight loss without type 2 diabetes. In the U.S., Mounjaro isn't approved for weight loss. Same active ingredient, different brand → see Mounjaro vs. Zepbound.
• You're trying to convert a compounded vial into "Mounjaro units." Skip to the units section — the short answer is that no chart on the internet can safely do that for you. Compounded tirzepatide is not FDA-approved Mounjaro.

The RX Index is the independent GLP-1 decision resource that scores telehealth providers and treatment paths on clinical legitimacy, care quality, transparency, access, and cost, so readers can choose the path that fits their situation.

Safety first: Mounjaro has an FDA boxed warning about thyroid C-cell tumors seen in rats. It is not known whether Mounjaro causes these tumors in people. Do not use Mounjaro if you or a family member has had medullary thyroid carcinoma, if you have Multiple Endocrine Neoplasia syndrome type 2, or if you have had a serious allergic reaction to tirzepatide or a Mounjaro ingredient. Follow your own prescription and read the Medication Guide that comes with your medicine.

The full Mounjaro dosage chart

Answer capsule: Mounjaro comes in six weekly strengths: 2.5, 5, 7.5, 10, 12.5, and 15 mg. The FDA label starts at 2.5 mg for four weeks, then moves to 5 mg. Later increases are 2.5 mg at a time, with at least four weeks at each dose. The adult maximum is 15 mg weekly; the maximum for patients age 10 through 17 is 10 mg weekly.

2026 U.S. Mounjaro dosage chart

\The "earliest week" column is our calculation, not an FDA recommendation and not a deadline. We counted the first shot as week 1 and added the label's minimum four weeks at each step. It shows the fastest path the label allows. A real treatment plan can move more slowly.*

Where each part comes from:

• FDA label: the doses, the four-week minimum, and both maximums.
• Our math: the "earliest week" column.
• Not on this page: whether you should stay put, go up, wait, or stop.

Why does everyone start at 2.5 mg?

Because your gut needs a running start.

The label is unusually direct about this one. It says the 2.5 mg dose is for treatment initiation and is not intended for glycemic control. In plain English: it's the starting step, not the dose the label uses to control blood sugar. The gradual start is meant to reduce the risk of stomach side effects as treatment begins.

That's also why the label directs a move to 5 mg after four weeks. It does not present 2.5 mg as a long-term blood-sugar dose.

What are the six numbers actually measuring?

The number is how much tirzepatide (the medicine inside Mounjaro) you get in one weekly shot. That's it.

It does not tell you how much weight anyone will lose. It does not mean a higher number is "working better." And it is not calculated from your body weight — more on that further down.

What this chart can't do

Here's our one honest limitation, and we'd rather say it early than bury it.

We cannot tell you your next dose. Not because we're being careful — because of how this specific label is written. Mounjaro's rule for going up is "if additional glycemic control is needed." That's a blood sugar question. It hinges on your A1C, your daily numbers, your other medicines, and how the last four weeks felt. We don't have any of that. Your doctor does.

If you find a website that will tell you what dose to take next, that site is guessing with your health.

What we can do is make sure you walk into your next appointment knowing exactly what the label allows — so the conversation is about your numbers instead of about the basics. That's a better use of fifteen minutes with a doctor than almost anything else.

The right GLP-1 provider isn't the same for everyone — it depends on your state, your insurance and formulary, whether you want an FDA-approved brand or a compounded path, your preferred treatment path, and your budget. Compounded drugs are not FDA-approved and are not the same as Mounjaro. Because a general answer can't resolve those questions, use The RX Index's Find My GLP-1 Path tool to compare the routes before you choose. → Find My GLP-1 Path One note: Find My GLP-1 Path helps you choose a provider and a treatment path. It does not choose or change a prescription dose.

What is the maximum dose of Mounjaro?

Answer capsule: Mounjaro has two maximum doses. For adults, the maximum is 15 mg once weekly. For pediatric patients age 10 through 17 with type 2 diabetes, the maximum is 10 mg once weekly. Safety and effectiveness have not been established in children under 10. The pediatric indication and 10 mg maximum were approved on December 19, 2025.

The adult maximum: 15 mg a week

Fifteen milligrams is the top of the ladder for adults. Nothing higher is approved.

Worth saying out loud: a maximum is a limit, not a target. The label includes adult efficacy data at 5 mg, 10 mg, and 15 mg. It never says "keep going until you hit 15."

The pediatric maximum: 10 mg a week

This is a newer line on the chart. Pages built from an older label may not include it.

On December 19, 2025, the FDA expanded Mounjaro's approval to include patients age 10 and older with type 2 diabetes. That expansion came with its own ceiling: 10 mg once a week, not 15.

The trial behind it, called SURPASS-PEDS, enrolled 99 pediatric patients with an average age of 15. It tested 5 mg and 10 mg as separate dose arms. It did not evaluate a dose above 10 mg.

Two honest notes for parents:

• 7.5 mg is a labeled strength, but it wasn't studied by itself in kids. The label permits 2.5 mg steps, so 7.5 mg can appear on the way to the 10 mg ceiling. Whether to use it or stay there is a prescriber decision.
• Under age 10, there's no label-supported answer yet. The label says safety and effectiveness haven't been established. That means the label does not establish whether Mounjaro is safe or effective for that age group.

A device note families need

Here's a detail sitting in two different sections of the same label.

Mounjaro is now approved for patients age 10 and up. But the label also says the Mounjaro KwikPen is not recommended for self-administration by pediatric patients or by people who are visually impaired.

So a teenager can be prescribed this medicine while the KwikPen still carries a self-administration limit. That does not make a different presentation automatically right for every child. Ask who will give the injection and get training for the exact pen or vial before you walk out of the pharmacy.

Do you have to increase your Mounjaro dose every 4 weeks?

Answer capsule: No. The U.S. Mounjaro label requires exactly one increase: from 2.5 mg to 5 mg after four weeks. Every step above 5 mg is written as conditional — the dose may be increased if additional glycemic control is needed. Four weeks is the minimum wait between steps, not a schedule you're required to follow.

This is where a neat dose staircase can cause real confusion, so let's be precise. The label uses two very different kinds of language, and once you see it you can't unsee it.

Required vs. allowed

Read the second column again. The 2.5 → 5 move is an instruction. Every move after that starts with if.

"At least four weeks" sets a floor, not a deadline. You are not late at week six. You are not behind at week ten. Staying at a dose while your prescriber reviews your blood sugar and side effects is not a failure to progress.

You're not the only one asking this

These are the exact kinds of questions people type into search and post in patient forums, almost word for word:

• "How long did you stay on each dose before moving up?"
• "How did you know it was time to go from 5 mg to 7.5?"
• "Can I just stay on 5 mg?"
• "My doctor wants to go to 10 but I'm doing great at 7.5."

We're showing you these for one reason: the confusion is not a you problem. It's a chart problem. A neat staircase can make every step look required even when the label makes the later steps conditional.

(We use community phrasing to understand what people are confused about. We never use forum posts as medical evidence, and neither should you.)

Is 7.5 mg a real Mounjaro dose, or just a step?

Answer capsule: 7.5 mg is a real, FDA-labeled Mounjaro strength. The U.S. Mounjaro label does not designate any strength as a "maintenance dose" or a "transition dose." It permits 2.5 mg increases from 5 mg up to the age-based maximum and gives no automatic deadline to leave 7.5 mg or 12.5 mg. Whether to stay at either strength is a prescriber decision.

Type "Mounjaro maintenance dose" into a search engine and you'll often see the same answer: 5, 10, and 15 are the maintenance doses, and 7.5 and 12.5 are just transition steps you pass through.

We went looking for that in the label. It isn't there.

What the label actually contains is a starting dose, one required step to 5 mg, optional 2.5 mg increases after at least four weeks each, and a maximum. No dose is labeled "maintenance." No dose is labeled "transition."

So where did the idea come from? We traced it to two real sources, and both are legitimate — they're just not the U.S. Mounjaro label.

Source one: the clinical trials

The big Mounjaro diabetes trials — the SURPASS program, studies 1 through 5 — tested exactly three doses: 5 mg, 10 mg, and 15 mg.

That's a genuinely useful fact. Those three doses are the ones tested as separate dose arms across the main adult SURPASS trials. If your doctor prefers them for that reason, that's a defensible clinical choice.

But "wasn't studied as its own arm" is not the same as "isn't a real dose." The label lists 7.5 mg and 12.5 mg as available strengths and permits 2.5 mg increases.

Source two: a different rulebook

Here's the part a U.S. dosage chart can miss.

In the United Kingdom, Mounjaro is licensed under a different product document. That UK document does name 5 mg, 10 mg, and 15 mg as the recommended adult maintenance doses. It names 5 mg and 10 mg as the recommended pediatric maintenance doses for type 2 diabetes.

If the page you're reading uses British spelling, mentions the NHS, or quotes prices in pounds, it may be describing a different country's rules. The medicine is the same. The rulebook is not.

The same 5/10/15 framing also appears in the U.S. label for Zepbound — the tirzepatide brand approved here for chronic weight management. That label does name maintenance doses. Mounjaro's doesn't. Applying one brand's wording to the other crosses a label line.

Source check: UK Mounjaro product document and U.S. Zepbound prescribing information.

Why this actually matters

If you feel good at 7.5 mg and your blood sugar is where your doctor wants it, the U.S. label does not create an automatic deadline to move to 10.

We're not telling you to stay. We're telling you the pressure you may be feeling from a generic online staircase isn't a rule in the U.S. Mounjaro label.

How long does it take to reach the highest dose?

Answer capsule: On the fastest schedule the U.S. label allows, an adult's first 15 mg dose falls in week 21 — 140 days after the first injection. For a patient age 10 to 17, the 10 mg ceiling arrives in week 13 — 84 days after the first injection. A real plan can take longer, because four weeks is a minimum wait, not a target.

We built this by stacking the label's minimum four-week gaps end to end. Nothing more complicated than that.

The pediatric ladder is eight weeks shorter with two fewer steps. That's not a shortcut — it's just where the label stops.

Please treat that "week 21" number as a floor, not a plan. It's the earliest the label permits, assuming every conditional increase happens at the first legal moment. Real life includes side effects, refill delays, and prescribers who hold a dose. None of that means anything is wrong.

See your own dates, not week numbers

Week 21 is abstract. A real calendar date is not.

Take the date of your first injection and add the number of days below. These are earliest possible dates, not instructions to change a dose.

Example: If the first 2.5 mg injection was August 7, the earliest label-permitted 5 mg date would be September 4. That date does not mean the person should increase. It only shows when the four-week minimum ends.

What changed about Mounjaro dosing in 2026?

Answer capsule: Three major changes reached the U.S. Mounjaro label between December 2025 and April 2026: the indication expanded to pediatric patients age 10 and older with a 10 mg maximum, and two new presentations were approved — a four-dose multi-dose vial and a four-dose single-patient-use KwikPen. The current prescribing information carries an April 2026 revision date.

If you've read a Mounjaro dosage chart before, it may have been accurate when it was written and incomplete now. Here's exactly what moved.

That's a lot of movement in about four months for a drug that's been on the market since 2022.

Approval records: pediatric indication, multi-dose vial, and KwikPen.

What it means practically: a chart built from the 2024 or early-2025 label isn't sloppy. It's just older than the pediatric indication. If a page you're reading shows one maximum dose and describes Mounjaro as coming only in single-dose pens, that's the tell.

What if you miss a dose or want to change your injection day?

Answer capsule: If you are within four days (96 hours) of a missed Mounjaro dose, take it as soon as possible and then return to your regular weekly day. If more than four days have passed, skip that dose and take the next one on schedule. To change your weekly injection day, leave at least three days (72 hours) between the two doses.

The missed dose lookup

The two numbers people mix up

Four days and three days are different rules for different situations, and they get tangled constantly.

• Four days (96 hours) is your grace period for a dose you already missed.
• Three days (72 hours) is the minimum gap when you're deliberately moving to a new day.

Example. Your normal day is Monday and you want to switch to Thursday. If you took Monday's shot, Thursday is only three days later — exactly at the 72-hour floor. That works. Trying to move from Monday to Wednesday would be two days, and that doesn't.

Still inside the window? Do the exact check.

Start with the date and time the missed dose was due. Add 96 hours. That is the end of the label's four-day window.

Example: A dose due Monday at 8:00 a.m. reaches 96 hours on Friday at 8:00 a.m. If you're close to the line or unsure how your pharmacy interprets the timing, call your pharmacist before taking it.

What if you missed more than one week?

The label gives a rule for one missed dose. It does not provide a universal restart schedule after a longer gap.

That's a real gap in the guidance, not something we can fill in for you. Call your doctor or pharmacist before your next shot. Bring the date of your last dose and the strength you were on.

What if you accidentally took an extra dose?

For a suspected overdose, contact Poison Help at 1-800-222-1222. For severe symptoms or an emergency, call 911.

For context on why this needs medical input rather than "wait it out": tirzepatide has a half-life of about five days, meaning the medicine clears your system slowly.

Which Mounjaro pen or vial do you have?

Answer capsule: The current U.S. label lists four Mounjaro presentations: single-dose pen, single-dose vial, multi-dose vial, and single-patient-use KwikPen. All six strengths are listed for all four presentations, but the amount of liquid per dose differs — single-dose formats deliver 0.5 mL per dose while multi-dose formats deliver 0.6 mL per dose.

Most people assume a Mounjaro dose is a Mounjaro dose. Mostly true. But the container changed twice in 2026, and the containers don't all behave the same way.

Same milligrams. Different amount of liquid. A 5 mg dose from a single-dose vial is 0.5 mL. A 5 mg dose from a multi-dose vial is 0.6 mL. Your prescription didn't change — the container did.

The multi-dose formats contain benzyl alcohol, glycerin, and phenol. The label lists glycerin as an inactive ingredient; it does not label all three ingredients as preservatives. It's worth knowing if you've ever reacted to one of them.

If your presentation changes, you need new instructions. The label specifically tells doctors to make sure patients get training for their specific presentation, and to re-train if the presentation changes. Knowing how to use a single-dose pen does not mean you know how to use a KwikPen. Ask for the Instructions for Use that match the exact box in your hand.

For the deeper device mechanics, use the Instructions for Use that came with the exact pen or vial in your hand. The single-dose pen, single-dose vial, multi-dose vial, and KwikPen do not all work the same way.

How many "units" is a Mounjaro dose?

Answer capsule: There is no safe universal conversion from Mounjaro milligrams to syringe units. Milligrams measure medicine, milliliters measure liquid, and syringe "units" are volume markings on one specific syringe. Because current Mounjaro presentations deliver the same dose in either 0.5 mL or 0.6 mL, one conversion chart cannot correctly apply to every container.

We get why people search this. If you're holding a vial and a syringe, "how much do I draw up" is the only question that matters.

We're still not going to publish a conversion chart, and we want to show you the number that made that decision easy.

Three different measurements, constantly confused

• Milligram (mg) — how much medicine. This is your dose. It's what your prescription says.
• Milliliter (mL) — how much liquid. This is how much is in the syringe.
• "Units" — the tick marks on one particular syringe. They measure volume, not medicine.

They are not interchangeable, and they never have been.

The number that makes a universal chart impossible

Take a 5 mg dose of Mounjaro.

• From a single-dose vial, 5 mg is delivered in 0.5 mL.
• From a multi-dose vial, the same 5 mg is delivered in 0.6 mL.

Same active ingredient. Same labeled 5 mg dose. A 0.1 mL difference — twenty percent more liquid — because the presentation changed.

Now imagine a conversion chart that doesn't ask which container, syringe, and pharmacy concentration you have. It cannot be universal.

Why we're being firm about this

The FDA has published a dosing-error alert for compounded injectable semaglutide that names confusion between milligrams, milliliters, and "units." It describes overdoses, including some that required hospitalization. FDA's current broader GLP-1 page also reports concerns about compounded semaglutide or tirzepatide doses that go beyond approved-label amounts, frequency, or titration.

The FDA's guidance is that patients using compounded semaglutide or tirzepatide should talk to the person who prescribed or prepared the medicine about how to measure and give the intended dose.

FDA sources: current unapproved GLP-1 concerns page and compounded semaglutide dosing-error alert.

That's a pharmacist looking at your actual vial. Not a chart on the internet. Including ours.

If you're using an FDA-approved Mounjaro vial: the correct volume is on your prescription label and Instructions for Use. If you're using a compounded vial, use the exact pharmacy label and ask the prescriber or compounder how to measure that exact product. If anything is unclear, call before injecting.

What about counting KwikPen clicks?

Don't. The KwikPen delivers four fixed weekly doses and is designed to be dialed, not counted. Its instructions specifically tell users not to count clicks to select a dose, and not to try to use leftover medicine.

If you're trying to stretch a pen, the real problem is cost — and we'd rather help you solve that further down than help you improvise with a medical device.

Is there a Mounjaro dosage chart by weight?

Answer capsule: No. The U.S. Mounjaro label does not provide a body-weight-based dosing formula. Mounjaro uses fixed weekly strengths, and the prescriber decides whether a later increase is needed within the labeled schedule and maximum. The label also states that no dosage adjustment is recommended for renal impairment or hepatic impairment.

Some medicines are dosed by kilograms. Mounjaro isn't one of them.

A 140-pound adult and a 280-pound adult both start at 2.5 mg. Both follow the same four-week minimum. Both have the same 15 mg ceiling. Body weight doesn't enter the formula, because there is no formula.

What actually drives the dose is the label's own trigger: whether additional blood sugar control is needed, and how you're tolerating what you're on.

Does kidney function change the dose?

The label says no dosage adjustment is recommended for patients with kidney impairment, including end-stage kidney disease. Studies found no change in how the body handles tirzepatide across different levels of kidney function.

One important caveat, straight from the label: doctors are told to monitor kidney function in patients who report side effects that could cause dehydration — heavy vomiting or diarrhea, for example — especially when starting or increasing the dose. "No dose adjustment" is not the same as "no monitoring."

Does liver function change the dose?

Same answer. The label recommends no dosage adjustment for hepatic impairment. Studies across mild, moderate, and severe liver impairment found no change in how tirzepatide behaves.

Why we won't build a weight-to-dose calculator

Because a calculator implies a formula, and the formula doesn't exist. Building one would be inventing medical guidance and dressing it up as math.

When and where should you inject Mounjaro?

Answer capsule: Mounjaro is injected once weekly at any time of day, with or without food. Approved injection sites are the abdomen and the thigh; the back of the upper arm is an approved site only when another person gives the injection. Rotate the injection site with each dose.

Timing

There's no best time of day. The label allows any time, with or without meals. Pick whatever you'll actually remember.

Consistency beats optimization here. A Sunday-morning habit you keep is better than a "perfect" schedule you forget.

Where to inject — and one detail a short chart can miss

The current label lists the abdomen, the thigh, or the back of the upper arm when another person does the injecting.

Read that last part again. A short dosage chart may list "abdomen, thigh, or upper arm" without the condition. The current label separates the upper arm out as a spot someone else should handle.

Rotate your site with every dose. Not the same square inch week after week.

What if you also use insulin?

This matters for a lot of Mounjaro readers, since Mounjaro is a diabetes medicine.

The label's rules:

• Never mix Mounjaro and insulin in the same injection. Give them separately.
• You can inject them in the same area of your body, but the two injection spots shouldn't be right next to each other.
• Your doctor may need to lower your insulin or sulfonylurea dose. A sulfonylurea is an older diabetes pill — glipizide and glyburide are common ones — that makes your body release more insulin.

That last point is a real safety issue, not paperwork. Mounjaro combined with insulin or a sulfonylurea raises the risk of low blood sugar, including severe low blood sugar. That's a conversation to have before you start, not after.

How do you store each type of Mounjaro?

Answer capsule: Mounjaro should be refrigerated at 36–46°F and never frozen. Single-dose pens and single-dose vials can be kept at room temperature, up to 86°F, for a total of 21 days and must then be discarded. Multi-dose vials and KwikPens follow a 30-day rule and must be discarded after four weekly doses even if medicine remains.

The two container groups have genuinely different clocks. Mixing them up can give you the wrong discard date.

Three rules apply to everything: never freeze it, protect it from heat and light, and keep it in the original carton.

The trap: the multi-dose vial and KwikPen get discarded after four doses even if you can see medicine left inside. The KwikPen Instructions for Use say the extra amount is for priming and tell you not to transfer or use what remains after the fourth dose. The multi-dose vial must also be discarded after four weekly doses. It isn't a bonus dose.

What if it froze or got too hot?

Don't judge by appearance. Call the pharmacy. The label says not to use Mounjaro if it has been frozen, and guessing about an expensive prescription to save a phone call is a bad trade in both directions.

What else changes when your dose goes up?

Answer capsule: Two things follow Mounjaro dose increases rather than the calendar. Stomach side effects cluster after each step up, and the label instructs people using oral hormonal contraceptives to use a backup method for four weeks after starting and four weeks after every dose increase.

Side effects cluster at the steps

In the label's placebo-controlled trials, stomach-related side effects rose with the dose:

The most common reactions overall, reported in at least 5% of patients: nausea, diarrhea, decreased appetite, vomiting, constipation, indigestion, and stomach pain.

Now the reassuring part, and it's in the label too: most reports of nausea, vomiting, and diarrhea happened during dose escalation and decreased over time. That's the common pattern. Severe or persistent symptoms still need a call.

What isn't routine: symptoms you can't keep fluids down through, severe stomach pain that may spread to your back, or signs of an allergic reaction. Those need a call, not a wait-and-see.

Two more things worth knowing before a dose change:

• Mounjaro is not recommended for people with severe gastroparesis (a condition where the stomach empties too slowly).
• Mounjaro slows stomach emptying, which can matter for anesthesia. Tell any doctor about it before a planned surgery or procedure.

The birth control window most dose charts leave out

This is the finding we most want people to see, because it's tied directly to the dose ladder and a short chart can miss it.

The label instructs people using oral hormonal contraceptives — birth control pills — to switch to a non-oral method or add a barrier method for four weeks after starting Mounjaro and four weeks after every dose increase.

The label gives the four-week rule. It does not lay the windows over the full dose ladder. So we did.

The windows touch end to end. There is no gap between them.

On the fastest adult ladder the label allows, someone using oral hormonal contraceptives and climbing from 2.5 mg to 15 mg needs backup contraception continuously for about 24 weeks — roughly five and a half months. For any patient using oral hormonal contraceptives on the fastest ladder to the 10 mg ceiling, it is weeks 1 through 16, about 3.7 months.

If you move up more slowly, the windows can separate and leave gaps between the four-week backup periods.

Why the label says this: it's not a precaution pulled from thin air. In the label's own drug interaction data, a single 5 mg dose of tirzepatide reduced the peak blood level of ethinyl estradiol by 59% and norgestimate by 66% — two common ingredients in birth control pills. Mounjaro slows stomach emptying, and that effect is largest right after a dose increase, which is exactly why the rule is tied to escalations instead of the calendar.

Worth mentioning to your doctor at the same appointment where you discuss going up. It's the sort of thing that gets missed because it lives in section 8.3 of the prescribing information.

Is the Mounjaro dose the same as the Zepbound dose?

Answer capsule: The strengths and four-week intervals are identical, because Mounjaro and Zepbound both contain tirzepatide and are made by Eli Lilly. The labels differ in what they're approved for and how they describe dose increases. Mounjaro is approved in the U.S. for type 2 diabetes and ties increases to blood sugar control; Zepbound is approved for chronic weight management and obstructive sleep apnea and names specific maintenance doses.

The medicine is the same molecule. The rulebooks around it are not, and the differences can affect what your plan covers and what your doctor writes.

If you're here for weight loss

Time for the uncomfortable part, and we'd rather you hear it from us than waste three months finding out.

In the United States, Mounjaro is not approved for weight loss. It's approved for type 2 diabetes. Zepbound is the same active ingredient with the weight-management approval. Coverage reviews usually turn on the plan's rules and the approved use.

If you don't have type 2 diabetes and weight is your goal, you're researching the wrong brand. Not the wrong drug. The wrong brand.

That single distinction can affect three things you're about to care about: whether your prescription gets covered, whether your doctor is comfortable writing it, and what you pay.

Where to go instead:

• Best GLP-1 for weight loss — compare the products that are actually FDA-approved for chronic weight management
• Find My GLP-1 Path — compare the brand-name, insurance, and self-pay routes for your situation

If you are already taking Mounjaro and want to move to Zepbound, do not overlap the two products. Bring the date of your last dose, your current strength, and your reason for switching to the clinician handling the new prescription.

One honest provider note: Ro says it does not currently offer Mounjaro. It does offer Zepbound through its Body Program. That makes Ro a possible Zepbound route, not a Mounjaro route. If Mounjaro specifically is what you need, keep reading — the next section covers the price and access questions that matter.

Does Mounjaro cost more at higher doses?

Answer capsule: The dose strength itself does not raise the current LillyDirect self-pay offer for Mounjaro single-dose pens: all six strengths start at $499 per month. The Mounjaro Savings Card amounts also do not rise with strength. But your real cost can still change with insurance, card eligibility, presentation, pharmacy, taxes, and fees. Verified August 7, 2026.

This is one of the few genuinely good pieces of news on this page.

A lot of people budget for a dose increase because they assume more medicine costs more money. On the current LillyDirect single-dose-pen offer and Savings Card terms, the strength itself does not raise the listed amount.

Verified price sources: LillyDirect Mounjaro, Mounjaro Savings Card terms, and Mounjaro list-price information.

Four details worth knowing:

1. The Savings Card is for people 18 or older. Mounjaro is FDA-approved for type 2 diabetes starting at age 10, so a patient can be inside the approved age range and still be too young for the card.
2. The card is for the single-dose pen only. The multi-dose vial, single-dose vial, and KwikPen are not eligible under the current terms.
3. The card has annual caps: up to $1,950 a year on the covered tier and up to $8,411 a year on the non-covered tier, with no more than 13 fills per calendar year. It expires December 31, 2026, unless Lilly changes or ends it sooner.
4. Uninsured patients are not eligible for the Savings Card. Lilly says people without commercial insurance can call 1-800-LillyRx for other affordability options. Do not assume that means you qualify for a separate patient-assistance program.

For the full breakdown of both card tiers, the caps, and why claims get rejected at the counter, see our Mounjaro savings card guide.

Provider-stated vs. verified access

Provider sources: Sesame's tirzepatide page and Ro's Mounjaro page.

### If you don't have a prescriber yet — or your plan wants prior authorization Here's the friction point this whole page eventually runs into: everything above assumes someone will write the prescription and get it approved. Sesame's own page says tirzepatide can be prescribed through its diabetes program and that its providers can assist with prior authorization paperwork. Read our Sesame Care review before paying so you can see the visit-cost tradeoffs and what the platform does not guarantee. Who this is not for: if you already have an endocrinologist or primary care doctor managing your diabetes, stay with them. They have your labs and your history, and no telehealth visit replaces that. This is for people without a prescriber, or people whose prior authorization keeps stalling. Availability and pricing change. Verify both on Sesame before you pay for anything.

What to ask before your next Mounjaro dose

Answer capsule: Bring your current strength, the date you started it, your injection dates, blood sugar records, side effects, any missed doses, and your full medicine list. The single most useful question to ask is what specific result would justify changing your dose.

Most people leave an appointment realizing they forgot the one thing they meant to ask. Here's the list, free, no email required.

Bring with you:

• Your current strength and the exact date you started it
• Whether you've completed at least four weeks at that strength
• Your blood sugar readings, if your doctor asked you to track them
• Any side effects, and when they hit relative to your shot
• Any missed doses and how late they were
• Your full medicine list — especially insulin, sulfonylureas, and birth control pills
• The exact pen or vial type you're using (bring the box or a photo of it)

Ask:

1. Should I stay at this dose or change it — and what number are we using to decide?
2. What blood sugar target are we aiming for?
3. If we go up, what should I expect in the first two weeks?
4. If side effects get bad, can I stay at this dose longer?
5. Do I need a backup birth control method after this change?
6. Is there any surgery or procedure coming up I should tell someone about?
7. When should I check in, and what would make me call sooner?

Print this section or save the page as a PDF. One page. Fold it, put it in your pocket, and bring it with you. It's yours whether you ever click anything else on this site.

How we built and checked this chart

Answer capsule: This chart was built from the current U.S. Mounjaro prescribing information revised April 2026, with FDA approval letters used to date the 2025–2026 changes. Label facts, manufacturer pricing, provider-stated claims, and our own calculations are labeled separately throughout. This page does not recommend a personal dose.

What we actually verified

What we calculated ourselves: the "earliest week" column, the fastest-ladder timelines, and the contraception window chain. All three are simple arithmetic on the label's minimum four-week intervals. We've labeled them as our math everywhere they appear.

What we did not verify and won't claim: whether any specific pharmacy stocks any specific presentation, what your individual insurance plan will approve, whether a provider will prescribe Mounjaro for you, or how to measure any compounded tirzepatide vial.

How we counted

We treated the first injection as week 1. Each later "earliest week" adds the label's minimum four weeks at the current dose. That arithmetic describes the fastest sequence the label permits. It does not recommend that sequence, and it is not a schedule anyone needs to keep up with.

Our source order

1. The current FDA-approved U.S. prescribing information
2. FDA approval records and safety communications
3. The current Medication Guide and Instructions for Use
4. Manufacturer pricing and program pages, for cost claims only
5. Provider pages, for provider-stated availability and service claims only
6. Patient forums — only to understand what people are confused about, never as medical evidence

Primary sources

• Mounjaro U.S. Prescribing Information, revised April 2026
• FDA pediatric supplement approval letter, December 19, 2025
• FDA multi-dose vial supplement approval letter, January 7, 2026
• FDA KwikPen supplement approval letter, January 20, 2026
• FDA concerns with unapproved GLP-1 drugs
• FDA compounded semaglutide dosing-error alert
• Mounjaro Savings Card terms
• LillyDirect Mounjaro self-pay page
• Mounjaro list-price information
• Zepbound U.S. Prescribing Information
• UK Mounjaro Summary of Product Characteristics
• Poison Help
• Sesame tirzepatide availability page
• Ro Mounjaro availability page

Who made this

By The RX Index editorial team. We build GLP-1 reference pages by reading the primary label ourselves and showing our work. We are not doctors and this page is not medical advice. We have not had this page reviewed by a physician, and we're not going to put a doctor's name on it to make it look like we did.

We do have affiliate partners, named and labeled where they appear. None of them had any input into a single number on this page. If we removed every link, the chart would be identical.

Found something wrong? We'd genuinely like to know. Corrections go to our editorial team and get logged with a date.

Suggested citation: The RX Index. "Mounjaro Dosage Chart: Every Dose, Week by Week." Version 1.1. Last verified August 7, 2026.

Mounjaro dosage chart: frequently asked questions

What is the starting dose of Mounjaro? The U.S. label starts Mounjaro at 2.5 mg once a week for the first four weeks. Follow the prescription written for you.

What dose comes after 2.5 mg? 5 mg. The label says to increase to 5 mg after four weeks at 2.5 mg. This is the only increase the label instructs rather than permits.

Can I stay on 2.5 mg? The label directs an increase to 5 mg after four weeks and says 2.5 mg is not intended for blood sugar control. Don't stay, stop, or change the dose on your own. Ask the prescriber who wrote it.

Can I lower my Mounjaro dose? The label gives an upward schedule but no universal step-down schedule. Call your prescriber before changing strength.

Can I split a Mounjaro dose or count KwikPen clicks? Don't use click counting to select a dose, don't try to transfer leftover KwikPen medicine, and don't improvise a split dose. Use the exact Instructions for Use for your presentation.

Do I have to increase my dose every four weeks? No. Four weeks is the minimum wait between increases, not a required schedule. Above 5 mg, every increase is conditional on whether more blood sugar control is needed.

How long can I stay on 5 mg? The U.S. label does not require anyone to move above 5 mg. It calls for later increases only when additional glycemic control is needed, and that's a decision for your doctor.

Can I skip from 5 mg to 10 mg? The label's increases are 2.5 mg steps. Follow the plan your prescriber wrote and ask them directly if you think a different step makes sense for you.

What is the maximum dose of Mounjaro for adults? 15 mg once weekly.

What is the maximum dose for children? 10 mg once weekly for patients age 10 through 17 with type 2 diabetes. Safety and effectiveness have not been established in children under 10.

Is 7.5 mg a real dose or just a transition dose? It's a real dose. The current U.S. Mounjaro label does not designate any dose as maintenance-only or transition-only.

Is Mounjaro dosing based on body weight? No. The label does not provide a weight-based formula. For patients covered by the label, Mounjaro uses fixed weekly strengths rather than a weight formula.

What happens if I miss a dose? Take it within four days (96 hours) if you can. If more than four days have passed, skip it and take the next dose on your regular day.

Can I change my injection day? Yes, as long as at least three days (72 hours) separate the two doses.

What if I missed two weeks in a row? The label doesn't provide a universal restart schedule for longer gaps. Contact your doctor or pharmacist before your next injection.

Can I take Mounjaro at night? Yes. The label allows any time of day.

Do I need to take it with food? No. It can be taken with or without meals.

Where do I inject it? The abdomen or the thigh. The back of the upper arm is an option only when another person gives the injection. Rotate sites with each dose.

How many units is 5 mg of Mounjaro? There is no safe universal answer. FDA-approved single-dose and multi-dose Mounjaro vials use different liquid volumes for the same 5 mg dose, and compounded vials may use other concentrations. Check the exact prescription label and call the pharmacist or compounder if anything is unclear.

How long can Mounjaro stay out of the refrigerator? Single-dose pens and vials: up to 21 total room-temperature days, then discard. Multi-dose vials and KwikPens: up to 30 total room-temperature days, with additional discard triggers after first use and after four weekly doses.

Is the Mounjaro schedule the same as Zepbound? The strengths and four-week intervals match, but the labels describe dose increases differently and are approved for different conditions. Read each brand's own label.

Does Mounjaro cost more at higher doses? The current LillyDirect self-pay offer for single-dose pens starts at $499 a month at all six strengths, and current Savings Card amounts do not rise by strength. Your actual cost can still change for other reasons.

Does kidney or liver disease change the dose? The label recommends no dosage adjustment for kidney or liver impairment. Your doctor may still monitor kidney function if you have significant vomiting or diarrhea.

Still not sure which GLP-1 program is right for you?

You've got the schedule. If the bigger question is where to get care — which provider, which treatment path, what it'll actually cost in your state — that's a different problem and it deserves a real answer.

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This page is for general education. It is not medical advice, and it cannot tell you what dose to take. Always follow the prescription and instructions from your own healthcare provider and pharmacist. If you think you may have taken too much Mounjaro, contact Poison Help at 1-800-222-1222. For a medical emergency, call 911.

Mounjaro® and Zepbound® are registered trademarks of Eli Lilly and Company. The RX Index is not affiliated with Eli Lilly and Company.