Januvia vs Ozempic is a daily pill vs a weekly shot that work on the same hormone system. Januvia (sitagliptin) is a DPP-4 inhibitor pill that keeps your body's own GLP-1 hormone active longer. Ozempic (semaglutide) is a GLP-1 shot that acts like that hormone directly.
In SUSTAIN 2, a 56-week head-to-head trial, semaglutide at the 1 mg Ozempic dose lowered A1C about three times as much as Januvia and led to about three times the weight loss. Januvia caused less nausea and comes as a pill. Some insurers won't cover both at once.
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.
Januvia vs Ozempic at a glance
| Januvia (sitagliptin) | Ozempic (semaglutide) | |
|---|---|---|
| Drug type | DPP-4 inhibitor | GLP-1 receptor agonist |
| How you take it | Pill, once a day | Shot, once a week |
| Label dose | 100 mg (lower if your kidneys are weak) | 0.25 mg to start, up to 2 mg |
| A1C drop in SUSTAIN 2 (56 weeks) | 0.5 points | 1.3 points (0.5 mg) or 1.6 points (1 mg) |
| Weight change in SUSTAIN 2 | Down 1.9 kg (about 4.2 lb) | Down 4.3 kg (about 9.5 lb) or 6.1 kg (about 13.4 lb) |
| Heart or kidney protection on the label | No | Yes, in adults with type 2 diabetes and heart disease or chronic kidney disease |
| FDA-approved for weight loss | No | No |
| Most common side effects | Colds, stuffy nose and sore throat, headache | Nausea, diarrhea, vomiting, constipation |
| Medicare negotiated price, 30 days | $113, since January 1, 2026 | $274, starting January 1, 2027 |
Sources for every row are in the sections below.
If you're weighing a GLP-1 against the pill you take now, The RX Index's Find My GLP-1 Path tool is free, takes about 2 minutes and needs no signup.
Is Ozempic stronger than Januvia?
Yes, for both blood sugar and weight, in the one big head-to-head trial. SUSTAIN 2 compared Ozempic-dose semaglutide shots with Januvia's 100 mg pill in 1,231 adults with type 2 diabetes who were already taking metformin, a thiazolidinedione, or both. Everyone got a real drug and a dummy, so nobody knew which one was active.
| After 56 weeks | Januvia 100 mg daily | Semaglutide 0.5 mg weekly | Semaglutide 1 mg weekly |
|---|---|---|---|
| A1C drop (starting average 8.1%) | 0.5 points | 1.3 points | 1.6 points |
| Weight lost (starting average 89.5 kg, about 197 lb) | 1.9 kg (about 4.2 lb) | 4.3 kg (about 9.5 lb) | 6.1 kg (about 13.4 lb) |
| Stopped because of side effects | 3% | 8% | 10% |
| Nausea | 7% | 18% | 18% |
| Confirmed low blood sugar | 1% | 2% | Under 1% |
What this means for you:
- A bigger A1C drop. If your A1C is well above goal, semaglutide moved it much further.
- More weight loss. Neither drug is approved for weight loss, but semaglutide led to more of it.
- More stomach trouble. About 1 in 10 people on the 1 mg dose stopped because of side effects, vs 3 in 100 on Januvia.
Can you take Januvia and Ozempic together?
Ask your prescriber first. Both work on the same GLP-1 system, and some plans' Ozempic rules deny coverage while you're still on a DPP-4 pill like Januvia or Janumet. Our Blue Cross Ozempic prior authorization guide shows which plans spell this out.
If you're switching, your prescriber will tell you when to stop Januvia. Don't stop it on your own.
Januvia vs Ozempic side effects
Januvia is usually easier on the stomach. Ozempic causes more nausea, especially early on.
- Januvia: Its label lists colds (upper respiratory infections), stuffy nose and sore throat, and headache as the most common side effects. Its warnings include pancreatitis, heart failure (seen with two other DPP-4 drugs), kidney problems, serious allergic reactions, severe joint pain, and a blistering skin condition called bullous pemphigoid.
- Ozempic: Nausea is the most common. In Ozempic's diabetes trials, 15.8% had nausea on 0.5 mg and 20.3% on 1 mg, vs 6.1% on placebo. Its warnings include pancreatitis, diabetic eye disease complications, kidney injury from dehydration, and gallbladder problems.
Ozempic has a boxed warning, the FDA's most serious kind: in rodents, semaglutide caused thyroid C-cell tumors, and it isn't known if that happens in people. Do not use Ozempic if you or a family member has had medullary thyroid cancer (MTC), or if you have Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).
Both can cause low blood sugar when used with insulin or a sulfonylurea. Januvia hasn't been studied in people who've had pancreatitis. Get medical help right away for severe belly pain that won't go away, or signs of an allergic reaction.
Heart and kidney benefits
Ozempic has FDA-approved heart and kidney uses; Januvia doesn't.
| FDA-approved use | Januvia | Ozempic |
|---|---|---|
| Blood sugar control in adults with type 2 diabetes | Yes | Yes |
| Lower risk of heart attack, stroke or cardiovascular death in adults with type 2 diabetes and heart disease | No | Yes |
| Lower risk of kidney decline, kidney failure and cardiovascular death in adults with type 2 diabetes and chronic kidney disease | No | Yes |
If you have kidney disease, Januvia's dose is lowered as kidney function drops. See our GLP-1 and kidney disease guide for more.
Compare GLP-1 options for your health goals
Januvia vs Ozempic cost
Januvia has the much lower Medicare price. With commercial insurance, it depends on your plan. Here's what we could verify:
| Price | Januvia | Ozempic |
|---|---|---|
| Medicare negotiated price, 30-day supply | $113, effective January 1, 2026 | $274, effective January 1, 2027 |
| List price CMS used | $527 for 30 days (2023) | $959 for 30 days (2024) |
| Current Novo list price | Not checked | $1,027.51 per pen (28 days) |
| Commercial savings card | Not checked | As little as $25 a month, up to $100 off a month, for up to 48 months, if your plan covers Ozempic |
| Manufacturer cash price | Not checked | $349 a month (0.25 to 1 mg) or $499 (2 mg); new patients pay $199 for 2 fills of 0.25 or 0.5 mg through December 31, 2026 |
A Medicare negotiated price is what Medicare and your Part D plan pay for the drug, not your copay. Your cost still depends on your plan. Novo Nordisk says most Part D plans cover Ozempic, but people with Medicare can't use the $25 savings card.
For more, see does Medicare cover Ozempic, does insurance cover Ozempic and our Ozempic savings card guide.
Should you switch from Januvia to Ozempic?
Your prescriber decides. Here's how the choice tends to break down:
| If this sounds like you | What to ask about |
|---|---|
| Your A1C is still above goal on Januvia | Semaglutide 1 mg lowered A1C about three times as much in SUSTAIN 2 |
| You want to lose weight too | Semaglutide led to more weight loss, but Ozempic isn't approved for weight loss |
| You have heart disease or chronic kidney disease | Ozempic has FDA-approved uses for both in type 2 diabetes |
| You want to stay on a pill | Ozempic also comes as a daily tablet now. See our best GLP-1 pill for diabetes guide |
| You've had pancreatitis, or MTC or MEN 2 runs in your family | Ask whether either drug is safe for you |
| Nausea is a deal-breaker | Januvia caused much less nausea in SUSTAIN 2 |
Other weekly shots are worth comparing too. See Trulicity vs Ozempic, Mounjaro vs Ozempic, Victoza vs Ozempic and, if weight loss is the main goal, Ozempic vs Wegovy.
Find the GLP-1 path that fits you
What we actually verified
- Read the Januvia label on DailyMed (Merck's current version) and the Ozempic prescribing information (revised May 2026) for uses, doses, warnings and side effects.
- Read the SUSTAIN 2 trial abstract on PubMed.
- Checked CMS's negotiated Medicare prices for 2026 and 2027.
- Opened Novo Nordisk's Ozempic list price and savings pages.
- Did the kilogram-to-pound math ourselves.
All checks were done on November 2, 2026. What we did not do: check Januvia's current list price or savings card, check generic sitagliptin prices, or get quotes from insurers or pharmacies. Insurer rules on combining the two come from our own earlier review of plan documents. Confirm with your plan before you fill.
Frequently asked questions
Is Januvia the same as Ozempic?
No. Januvia (sitagliptin) is a DPP-4 inhibitor pill taken once a day. Ozempic (semaglutide) is a GLP-1 shot taken once a week. Both treat type 2 diabetes and work on the same hormone system, but Ozempic lowered A1C and weight more in the SUSTAIN 2 trial.
Which works better, Januvia or Ozempic?
In the 56-week SUSTAIN 2 trial, semaglutide 1 mg lowered A1C by 1.6 points vs 0.5 for Januvia, and weight by 6.1 kg (about 13.4 lb) vs 1.9 kg (about 4.2 lb).
Can you take Januvia and Ozempic together?
Ask your prescriber. Both work on the same GLP-1 system, and some insurers won't cover Ozempic while you're on a DPP-4 pill like Januvia. Don't change anything on your own.
Does Januvia cause weight loss like Ozempic?
Not much. In SUSTAIN 2, people on Januvia lost 1.9 kg (about 4.2 lb) over 56 weeks vs 4.3 to 6.1 kg on semaglutide. Neither drug is FDA-approved for weight loss.
Is Januvia cheaper than Ozempic?
On Medicare, yes. Januvia's negotiated price is $113 for 30 days in 2026. Ozempic's is $274 starting January 1, 2027. With commercial insurance, Ozempic's savings card can bring the cost down to as little as $25 a month if your plan covers it.
Should I switch from Januvia to Ozempic?
Ask your prescriber, especially if your A1C is still high, you want to lose weight, or you have heart or kidney disease. Ozempic has more side effects, mainly nausea.
Still not sure which GLP-1 path fits you? Take The RX Index's free Find My GLP-1 Path quiz — about 2 minutes, no signup.
Sources
- Januvia (sitagliptin) label, DailyMed (Merck; checked November 2, 2026)
- Ozempic prescribing information (Novo Nordisk, revised May 2026; checked November 2, 2026)
- SUSTAIN 2: semaglutide vs sitagliptin, Lancet Diabetes & Endocrinology, 2017 (PubMed) (checked November 2, 2026)
- CMS: negotiated prices for 2026 (checked November 2, 2026)
- CMS: negotiated prices for 2027 (PDF) (checked November 2, 2026)
- Novo Nordisk: Ozempic pricing (list price) (checked November 2, 2026)
- Ozempic: savings and self-pay offers (checked November 2, 2026)