Can you drink alcohol on Wegovy?

No hard contraindication, but alcohol tolerance often drops sharply on GLP-1. Many patients also report reduced desire for alcohol — likely a secondary effect of GLP-1 on the brain reward system.

Does GLP-1 affect oral birth control?

Tirzepatide (Mounjaro, Zepbound) has documented reduced absorption of oral contraceptives during the first 4 weeks of each dose increase. Use backup contraception for ~4 weeks after starting + after each step-up. Semaglutide has no documented effect.

Can I take GLP-1 while pregnant?

No. All FDA-approved GLP-1s carry a pregnancy contraindication. Stop GLP-1 at least 2 months before planned conception due to its long half-life.

Is it safe to take GLP-1 long-term?

Liraglutide has 15+ years of post-marketing data (Victoza approved 2010). Semaglutide has 8+ years (Ozempic approved 2017). No new class-wide safety signals have emerged in extended follow-up. Chronic use is the FDA-approved indication for both T2D and obesity.

Safety topic

GLP-1 medications during pregnancy and breastfeeding

All FDA-approved GLP-1 medications are contraindicated in pregnancy. Stop at least 2 months before planned conception due to long half-life. Lactation use is not FDA-approved; some clinicians resume after weaning.

Real, documented risk

Who should not take this

Pregnancy (confirmed or planned within 2 months)
Lactation (not FDA-approved; specialist consultation if considered)

How it happens

Animal studies showed fetal harm at therapeutic doses (reduced fetal weight, structural anomalies). Human data is limited but the precaution applies based on the animal signal. Semaglutide and tirzepatide both have ~7-day half-lives — ~99% washout takes 5-7 weeks, so a 2-month buffer accounts for cycle variability.

Red flags — when to seek care

Confirmed pregnancy while on a GLP-1 — discontinue immediately
Unplanned pregnancy risk + tirzepatide use — see /can-i-take/birth-control-with-mounjaro (tirzepatide reduces oral contraceptive absorption)

What to do

1.Stop the GLP-1 at least 2 months before planned conception
2.On confirmed pregnancy, discontinue immediately and notify prescriber
3.For tirzepatide users: use barrier or non-oral contraception (IUD, implant) for 4 weeks after initiation + each dose escalation
4.Post-partum + lactation: not FDA-approved; specialist guidance required if considered

Affected medications

Sources

Common questions readers ask

Can you drink alcohol on Wegovy?: No hard contraindication, but alcohol tolerance often drops sharply on GLP-1. Many patients also report reduced desire for alcohol — likely a secondary effect of GLP-1 on the brain reward system.
Does GLP-1 affect oral birth control?: Tirzepatide (Mounjaro, Zepbound) has documented reduced absorption of oral contraceptives during the first 4 weeks of each dose increase. Use backup contraception for ~4 weeks after starting + after each step-up. Semaglutide has no documented effect.
Can I take GLP-1 while pregnant?: No. All FDA-approved GLP-1s carry a pregnancy contraindication. Stop GLP-1 at least 2 months before planned conception due to its long half-life.
Is it safe to take GLP-1 long-term?: Liraglutide has 15+ years of post-marketing data (Victoza approved 2010). Semaglutide has 8+ years (Ozempic approved 2017). No new class-wide safety signals have emerged in extended follow-up. Chronic use is the FDA-approved indication for both T2D and obesity.

Editorial information based on FDA prescribing data + peer-reviewed sources as of 2026. Not personal medical advice. Reviewed by Jane Novak, MD, MPH.