Guide

GLP-1 medicines, pregnancy, contraception and washout

Do not start or continue a GLP-1 medicine in pregnancy without specialist advice. Discuss contraception, pregnancy plans and washout timing with a clinician.

Updated 2 May 2026Written by GLP1 Tablets editorial teamUK information guide, not medical advice

Quick answer

Pregnancy

Tell a clinician if you are pregnant, trying to conceive or breastfeeding.

Contraception

Vomiting or diarrhoea can affect oral contraceptive reliability.

Washout

Stopping time depends on the exact medicine.

What this means for UK readers

  • Ask before starting if pregnancy is possible.
  • Seek advice if severe vomiting or diarrhoea could affect contraception.
  • Do not rely on a general web answer for washout timing.
  • Use the patient leaflet for medicine-specific pregnancy information.

Practical checklist

CheckWhy it matters
Before treatmentDiscuss pregnancy plans and contraception.
During treatmentReport pregnancy promptly.
Digestive upsetAsk about backup contraception if vomiting or diarrhoea occurs.
StoppingUse medicine-specific advice.

FAQs

Can I take GLP-1 medicines while pregnant?

This needs clinician advice and medicine-specific guidance.

Can vomiting affect the pill?

Yes, vomiting or diarrhoea can affect oral contraceptive reliability.

How long should I stop before pregnancy?

Ask a clinician because washout differs by medicine.

Next useful reads

Sources