Rybelsus and Januvia: Is It Safe? Label, Studies
Usually not combined: a DPP-4 pill like Januvia adds no extra sugar lowering on a GLP-1.
- Verdict
- Avoid together
- Label names it
- No
- General caution
- Pills absorbed more slowly
Check a GLP-1 interaction
Rybelsus in brief
Its half-life is about 1 week: after 7 d half is gone, and after five half-lives (35 d) about 3% is left.
Type 2 diabetes over 26 weeks in PIONEER 1: 3.7 kg lost, compared with 1.4 kg on placebo.
Monthly amounts in US dollars cover the list price, plus self-pay offers, each read from the price page published by the maker.
Sources: FDA label (DailyMed), healthsystemtracker.org, Novo Nordisk pricing, Novo Nordisk.
Rybelsus and Januvia: the verdict
Avoid together
Quoted word for word from the Rybelsus label's drug interactions section:
“Semaglutide cause a delay of gastric emptying and thereby has the potential to impact the absorption of other oral drugs. Levothyroxine exposure was increased 33%”
Source: the FDA label (DailyMed).
Statements in the Rybelsus label
The Rybelsus label does not name Januvia (sitagliptin). Those lines still apply to it as well.
| Named in the label | The risk | What the label tells doctors |
|---|---|---|
| Insulin or sulfonylureas | Low blood sugar | Low blood sugar is more likely when this drug is used with insulin, or alongside a sulfonylurea drug such as glipizide or glimepiride. |
| Oral medicines | Pills absorbed differently | It slows stomach emptying, so other pills can be absorbed differently. |
Source: the Rybelsus label (DailyMed).
What the studies show
- not recommended guideline
- how Januvia works, and that it raises active GLP-1
Sources: diabetesjournals.org, FDA label (DailyMed).
The practical rule
- If your list includes both, ask your prescriber if you still need the Januvia.
- Let your GLP-1 prescriber know about every pill you take, including this one.
- Talk with your pharmacist about whether any pills you take need a steady blood level. Those checks may be needed when you start or raise the dose.
- Check your blood sugar more often in the first weeks and after each dose increase.
Source: the FDA label (DailyMed).
Januvia with other GLP-1s
None of the 10 GLP-1 labels names Januvia (sitagliptin) in the drug interaction section. Each label gives the same general warning about swallowed pills, so the answer holds for the whole class.
That same question applies to Ozempic, Trulicity.
Source: the FDA label (DailyMed).