Yes. Mounjaro® may reduce the effectiveness of oral contraceptive pills, which can increase the risk of an unplanned pregnancy.
Overview
This article explains:
How Mounjaro® can affect oral contraception
When additional contraception is recommended
What to do if vomiting or diarrhoea occurs
Guidance for planning pregnancy after stopping Mounjaro®
Use this information to understand contraception safety while taking Mounjaro®.
Why Mounjaro® can affect oral contraception
Mounjaro® slows stomach emptying, which may reduce how well the body absorbs oral contraceptive pills.
Reduced absorption can lower contraceptive effectiveness and increase pregnancy risk.
Recommended contraception while using Mounjaro®
While taking Mounjaro®, protection should include:
An additional barrier method, such as condoms, or
A non-oral contraceptive method, such as:
Intrauterine device (IUD)
Contraceptive implant
These options are not affected by stomach emptying or absorption changes.
Vomiting or diarrhoea and oral contraceptive protection
If taking oral contraceptive pills while using Mounjaro®:
Vomiting within 3 hours of taking the pill may require a repeat contraceptive dose
Severe diarrhoea lasting more than 24 hours can reduce pill effectiveness
Persistent vomiting or diarrhoea may make non-oral contraception more appropriate for reliable protection.
Planning pregnancy after stopping Mounjaro®
If planning pregnancy, it is recommended to wait at least 1 month after the final Mounjaro® dose before trying to conceive.
This waiting period allows the medication to clear from the body.
Key takeaway
Mounjaro® may reduce the effectiveness of oral contraceptive pills.
Barrier or non-oral contraception is recommended while taking Mounjaro®.
Vomiting or diarrhoea can further reduce pill effectiveness.
Wait at least 1 month after stopping Mounjaro® before attempting pregnancy.
If you still need help after reviewing the information above, additional assistance is available.