Evidence explainerWomen's GLP-1 & Weight

GLP-1s, the Pill and Pregnancy: The Label Warnings Women Need Before Starting

Tirzepatide can make oral birth control less reliable at the start and after each dose increase. Semaglutide needs a 2-month washout before trying to conceive. Both labels say to stop when pregnancy is recognized.

By Kymata Health editorial teamPublished October 10, 2026Last verified October 10, 2026

Medical review pending. Written by our editorial team from the studies and documents cited below; a credentialed clinician has not reviewed it yet. Educational only, not medical advice.

Key takeaways

  • Zepbound's label says oral contraceptives may work less well because tirzepatide delays stomach emptying, most after the first dose [1].
  • The label advises switching to a non-oral method or adding a barrier method for 4 weeks after starting and for 4 weeks after each dose increase [1].
  • Hormonal contraceptives that are not taken by mouth should not be affected, per the Zepbound label [1].
  • Wegovy's label says to stop at least 2 months before a planned pregnancy because of semaglutide's long half-life [2].
  • Both labels say to stop the drug when pregnancy is recognized when it is used for weight reduction [1][2].

Tirzepatide and the pill

Tirzepatide slows how fast the stomach empties, which can reduce how much of an oral medicine is absorbed. The Zepbound label applies this to oral hormonal contraceptives and says the delay is largest after the first dose and diminishes over time [1].

Its advice: switch to a non-oral contraceptive, or add a barrier method such as condoms, for 4 weeks after starting and for 4 weeks after every dose increase [1]. With dose increases every 4 weeks or more, that can mean several months of backup.

Semaglutide and planning a pregnancy

Semaglutide has a long half-life, so it stays in the body for weeks after the last dose. The Wegovy label says people using it for weight reduction should stop at least 2 months before a planned pregnancy and stop when pregnancy is recognized [2].

Breastfeeding

The Wegovy label does not recommend breastfeeding during treatment with Wegovy tablets [2]; discuss the injection with your clinician.

If your GLP-1 is compounded

The label instructions above come from the FDA-approved products. Compounded semaglutide and tirzepatide are not FDA-approved and have no FDA-reviewed label; the FDA advises contacting the compounder or the telehealth platform that sold the drug with questions about instructions for use [3]. Assume the same birth-control and pregnancy precautions apply until your prescriber says otherwise.

Quick answers

Does semaglutide interact with the pill like tirzepatide does?

The backup-contraception instruction on this page comes from the Zepbound (tirzepatide) label [1]. Ask your prescriber about your specific medicine and pill.

How long before trying to conceive should I stop Wegovy?

At least 2 months, according to its label [2].

More in Women's GLP-1 & Weight

References

  1. [1]ZEPBOUND (tirzepatide) injection: prescribing information. U.S. Food and Drug Administration (Drugs@FDA), 2026.
  2. [2]WEGOVY (semaglutide) injection and tablets: prescribing information. U.S. Food and Drug Administration (Drugs@FDA), 2026.
  3. [3]FDA's Concerns with Unapproved GLP-1 Drugs Used for Weight Loss (content current as of 10/01/2026). U.S. Food and Drug Administration, 2026.

Dietary supplements are not intended to diagnose, treat, cure or prevent any disease, and these statements have not been evaluated by the FDA. Prescription options need a licensed clinician. Talk to your clinician or pharmacist before starting anything new, especially if you take prescription medicines, are pregnant or breastfeeding.

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