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 and medullary thyroid cancer (MTC) risk

GLP-1 medications carry a boxed warning for medullary thyroid carcinoma based on rodent studies. No human cases have been attributed to GLP-1 use despite 10+ years of post-approval surveillance. Personal or family history of MTC or MEN-2 is a hard contraindication.

Rodent-only signal

Who should not take this

Personal history of medullary thyroid carcinoma (MTC)
Family history of MTC (any first-degree relative)
Multiple Endocrine Neoplasia syndrome type 2 (MEN-2)

How it happens

Rodent thyroid C-cells express GLP-1 receptors at higher density than human C-cells. In long-duration rodent studies, GLP-1 agonists caused C-cell proliferation and medullary thyroid tumors. Human C-cells appear less sensitive — extensive pharmacovigilance data over 10+ years has not detected an MTC signal in humans.

Red flags — when to seek care

New thyroid nodule or neck mass
Persistent hoarseness without explanation
Difficulty swallowing or breathing

What to do

1.Tell your prescriber about any personal or family history of thyroid cancer before starting
2.Routine thyroid ultrasound screening is NOT recommended unless personal or family MTC/MEN-2 history
3.Report a new neck mass, hoarseness, or dysphagia promptly

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.