Tirzepatide and Metformin: Is It Safe? Label, Studies
Commonly used together; Tirzepatide was tested alongside metformin in its trials.
- Verdict
- The combination is generally fine
- Label names it
- 0 of 2
- General caution
- Pills absorbed more slowly
Check a GLP-1 interaction
Zepbound facts at a glance
Half-life: 5 to 6 days. After 5.5 d, half is gone; five half-lives (27.5 d) leave about 3%.
In SURMOUNT-1 at 72 weeks, the figures were 20.9% of body weight and 3.1% on placebo.
Monthly US dollar price points: the maker's price page lists the list price and self-pay offers.
Sources: FDA label (DailyMed), Eli Lilly 1 2, cnbc.com.
Tirzepatide and metformin: the verdict
The combination is generally fine
Directly quoted from the Mounjaro label’s drug interactions section:
“MOUNJARO delays gastric emptying and thereby has the potential to impact the absorption of concomitantly administered oral medications. Caution should be exercised when oral medications”
Source: FDA label (DailyMed).
Details from the tirzepatide label
The Mounjaro label does not name metformin. The statements still apply to it.
| Named in the label | The risk | What the label tells doctors |
|---|---|---|
| Insulin or sulfonylureas | Low blood sugar | Taking Insulin or sulfonylureas with this medicine raises the risk of low blood sugar. Examples of sulfonylureas include glipizide and glimepiride. |
| Oral medicines | Pills absorbed differently | Slower stomach emptying can change how the body absorbs other pills. |
Source: Mounjaro label (DailyMed).
What the studies show
- clinical trials involving use with metformin
Source: FDA label (DailyMed).
The practical rule
- Keep taking both as prescribed. Tell your doctor if stomach upset continues.
- Tell the person who prescribes your GLP-1 about every pill you take, including this one.
- Ask your pharmacist whether any pills you take need a steady blood level. They may need to be checked when you start treatment or increase the dose.
- More frequent blood sugar checks are needed during the first weeks and following every dose increase.
Source: FDA label (DailyMed).
Metformin with other GLP-1s
None of the 10 GLP-1 labels name Metformin in the drug interaction section. Across the class, the answer is the same, since each medicine carries the same general caution for swallowed pills.
Regarding Ozempic, Wegovy, Rybelsus, Mounjaro, Zepbound, Trulicity, the same question applies.
Source: FDA label (DailyMed).