Short answer
In the United States the brand‑name Januvia (sitagliptin) is no longer exclusive—generic sitagliptin has been available since late 2019/early 2020. The first FDA‑approved generic came from Teva, and other generics followed in the next few months.
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Why that date?
| Event | Approximate date | What it means |
|-------|------------------|---------------|
| Primary “method of use” patent expires | April 2018 | The key U.S. patent covering the use of sitagliptin to treat type‑2 diabetes (U.S. patent 7,739,385) was due to expire then. |
| FDA approves first generic | December 2019 | Teva’s generic sitagliptin received FDA approval on Dec 12, 2019. |
| First generic product hits the market | Early 2020 | Teva launched the generic, making it available to prescribers and patients. |
| Additional generics enter the market | 2020‑2021 | Other manufacturers (e.g., Mylan, Cipla, etc.) received approvals and started selling generic sitagliptin, further lowering costs. |
Bottom line: The generic version of Januvia has been on the market in the U.S. since early 2020, and similar approvals have followed in most other major markets (EU, Canada, Australia, etc.).
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What does this mean for you?
| Scenario | What you’ll see |
|----------|-----------------|
| You’re filling a new prescription for sitagliptin | Your pharmacist can choose a generic (usually called “sitagliptin” or “sitagliptin base”) unless you specifically request the brand name. |
| You’re already on Januvia | You can ask your prescriber or pharmacist to switch you to a generic. The drug’s effectiveness, safety profile, and dosing are identical; only the name and cost differ. |
| Cost savings | Generics are typically 60‑80 % cheaper than the brand name, so switching can reduce your out‑of‑pocket expenses. |
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How to find a generic
1. Ask your pharmacist: They’ll automatically dispense the generic if it’s available and if you have insurance that covers it.
2. Check your insurance formulary: Most plans list sitagliptin as a generic.
3. Look at online pharmacies: Many reputable U.S. and international pharmacies offer generic sitagliptin at competitive prices.
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Key take‑away
Januvia itself is still sold by Merck under the brand name, but the drug’s patent life is over, and generic sitagliptin has been available in the U.S. for over three years now. If you’re looking for lower costs, the generic route is a proven and safe option.