No. The Zepbound label says to stop tirzepatide as soon as a pregnancy is recognized. The reason is simple: weight loss offers no benefit in pregnancy, and animal studies show the drug may harm a fetus. The label also warns that tirzepatide can make birth control pills less reliable, so a surprise pregnancy is more likely than you might expect. Tell your prescriber if you are pregnant or planning to be. Start with our tirzepatide guide if you are new to the drug.
Key takeaways
- The label says tirzepatide may cause fetal harm, based on animal studies. There are no adequate human studies.
- Zepbound's label says to discontinue the drug when pregnancy is recognized, because weight loss has no benefit during pregnancy.
- Tirzepatide slows the stomach and may reduce absorption of birth control pills. The label calls for a non-oral or barrier method for 4 weeks after starting and after each dose increase.
- There are no human data on tirzepatide in breast milk. The label tells you to weigh the benefits of breastfeeding against the possible risk with your prescriber.
- Compounded tirzepatide carries the same pregnancy facts. It is not FDA approved and is not interchangeable with Zepbound or Mounjaro.
Tirzepatide pregnancy facts, straight from the label
Everything on this page comes from the Use in Specific Populations and Drug Interactions sections of the Zepbound and Mounjaro labels. Here is each situation and what the label says about it.
| Situation | What the label says | What to do |
|---|---|---|
| You find out you are pregnant | Zepbound: discontinue when pregnancy is recognized. Weight loss offers no benefit in pregnancy and may harm the fetus. | Call your prescriber the same day. Do not wait for your next dose. |
| You are planning a pregnancy | Tell your prescriber if you are pregnant or plan to become pregnant. | Discuss timing before you conceive. The label does not set a fixed washout period. |
| You take birth control pills | Tirzepatide may reduce their absorption. | Use a non-oral method, or add a barrier method, for 4 weeks after starting and for 4 weeks after each dose increase. |
| You are breastfeeding | No data on tirzepatide in human milk, on the breastfed infant, or on milk production. | Weigh the benefit of breastfeeding against the possible risk, with your prescriber. |
| You have type 2 diabetes (Mounjaro) | Same animal-study warning. Poorly controlled diabetes in pregnancy carries its own risks. | Your prescriber decides how to manage blood sugar during pregnancy. |
Source: Zepbound and Mounjaro labels, Use in Specific Populations and Drug Interactions sections (DailyMed).
Why the label says to stop Zepbound during pregnancy
Two reasons sit behind the rule. First, in animal studies, tirzepatide caused fetal harm. The label uses that phrase because there are no adequate, well-controlled studies in pregnant women. No one is going to run one. Second, the point of Zepbound is weight loss, and losing weight is not a goal in pregnancy. So the risk has no benefit to balance it. That is why the Zepbound label goes further than "talk to your doctor" and says to stop the drug once you know you are pregnant.
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Start Free Assessment →How fast does it leave your body? The label gives a half-life of about 5 days. The drug does not vanish the day you stop. But there is no label instruction to take anything to speed it up, and nothing you should do on your own beyond calling your prescriber.
Zepbound during pregnancy: what if you took a dose before you knew?
This is common. Many people find out they are pregnant a few weeks in, after one or more doses. The label does not say a single exposure means harm. It says the drug may cause fetal harm and should be stopped. What to do is clear: stop, call the prescriber who wrote for tirzepatide, and call an obstetric provider so the pregnancy can be dated and followed. Do not take the next dose while you wait for a call back.
The birth control interaction most people miss
Tirzepatide slows how fast your stomach empties. That effect is strongest after the first dose and after each dose increase. Birth control pills need to be absorbed on a steady schedule to work. So the label tells anyone on the pill to switch to a non-oral method, or add a barrier method, for 4 weeks after the first dose and for 4 weeks after each step up. Non-oral means an IUD, implant, patch, ring or shot. Barrier means condoms, used along with the pill.
| Event | Backup needed? | For how long |
|---|---|---|
| First dose of tirzepatide (2.5 mg) | Yes | 4 weeks |
| Each dose increase (for example 2.5 to 5 mg, 5 to 7.5 mg) | Yes | 4 weeks after the increase |
| Stable dose for more than 4 weeks | Not required by the label | Ask your prescriber if unsure |
Source: Zepbound and Mounjaro labels, Drug Interactions section (DailyMed).
The label does not discuss fertility. But if your periods change while you are on tirzepatide, or if you could become pregnant, that is one more reason to use a method that does not depend on your stomach. See our page on tirzepatide drug interactions for the full list.
Tirzepatide and breastfeeding
The label is blunt here. There are no data on whether tirzepatide passes into human milk, what it might do to a breastfed infant, or whether it affects milk supply. The label says to consider the developmental and health benefits of breastfeeding along with the mother's need for the drug and any possible effect on the infant. That is a decision for you and your prescriber, not a rule anyone can give you from a web page.
What this means for compounded tirzepatide
Compounded tirzepatide is the same active molecule. The pregnancy warning, the breastfeeding gap, and the birth control interaction all carry over. It is not FDA approved and is not interchangeable with Zepbound or Mounjaro. FormBlends prescriptions are written by independent, state-licensed clinicians of Recess MD LLC. The assessment asks whether you are pregnant, breastfeeding or planning a pregnancy, and the clinician will not prescribe if the answer rules it out. If the provider does not prescribe, the charge is refunded. See pricing or start an assessment.
Frequently Asked Questions
Can you take tirzepatide while pregnant?
No. The Zepbound label says to stop tirzepatide when pregnancy is recognized. Animal studies show the drug may harm a fetus, and weight loss has no benefit in pregnancy. Call your prescriber as soon as you know.
What happens if I get pregnant on tirzepatide?
Stop the drug and call both your tirzepatide prescriber and an obstetric provider. The label does not say a single exposure causes harm; it says the drug may cause fetal harm and should be stopped. Your pregnancy can then be dated and followed normally.
How long before trying to conceive should I stop tirzepatide?
The label does not set a washout period. It does give a half-life of about 5 days, so the drug takes weeks to clear. Your prescriber can set a plan based on your dose and your health.
Can I use Zepbound during pregnancy if I have diabetes?
The Zepbound label says to discontinue when pregnancy is recognized. Mounjaro carries the same animal-study warning. Your prescriber decides how to manage blood sugar in pregnancy, and that plan should be made before you conceive if possible.
Does tirzepatide affect birth control?
Yes. The label says tirzepatide may reduce absorption of oral hormonal contraceptives. Use a non-oral method, or add a barrier method, for 4 weeks after starting and for 4 weeks after each dose increase.
Sources
- Zepbound (tirzepatide) prescribing information, DailyMed, Eli Lilly, revised 08/2026.
- Mounjaro (tirzepatide) prescribing information, DailyMed, Eli Lilly, revised 08/2026.
- Zepbound U.S. prescribing information (PDF), Eli Lilly, revised 08/2026.
- Compounding and the FDA: Questions and Answers, U.S. Food and Drug Administration.
Next steps
Read how long tirzepatide stays in your system and the full tirzepatide side effects guide. Browse the tirzepatide hub for every other tirzepatide question. Talk to a licensed clinician before starting, stopping or changing this medicine. Compounded tirzepatide is not FDA approved and is not interchangeable with Zepbound or Mounjaro; a licensed provider decides whether it is appropriate for you.
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