Mounjaro and contraception - Pound Hill Medical Group

Warning advice: Important

Please read the information below carefully if you are using both Mounjaro and a Contraceptive. If you feel this applies to you or would like to discuss further, please contact the surgery.

Non-urgent advice: What are GLP-1 agonists?

GLP-1 agonists are medicines like tirzepatide and semaglutide. They might have other brand names too. These medicines can only be given by a doctor or nurse. They are used for people with type 2 diabetes or to help with losing weight. They work by making food leave the stomach more slowly.

Medication	Brand name examples
Tirzepatide	Mounjaro
Semaglutide	Ozempic, Wegovy, Rybelsus
Exenatide	Bydureon BCise
Liraglutide	Saxenda, Diavic, Victoza
Dulaglutide	Trulicity
Lixisenatide	Contained in Suliqua

Non-urgent advice: I am taking the pill. Will using a GLP-1 agonist affect my contraception?

This depends on the type of GLP-1 agonist that you are using.

If you are using tirzepatide (Mounjaro), you should use condoms along with your pill for four weeks after you start the medicine and for four weeks after any dose increase. This is because tirzepatide works a bit differently from other similar medicines. You might also think about using a different type of contraception that isn’t a pill while on tirzepatide.

For other medicines like semaglutide, exenatide, liraglutide, dulaglutide, or lixisenatide, there is no proof that they make the pill less effective.

Non-urgent advice: I have diarrhoea and vomiting with my GLP-1 agonist, and I take the contraceptive pill, what should I do?

Diarrhoea and vomiting can happen when taking GLP-1 agonists and might make the pill less effective. If you vomit within three hours of taking your pill, or have bad diarrhoea for more than a day, follow the guidance for missed pills. If diarrhoea or vomiting continues, think about using a different type of contraception that isn’t a pill, or use condoms as well.

Non-urgent advice: What about non-oral methods of contraception e.g. the coil, implant, injection, patch or ring, could these be affected by GLP-1 agonists?

GLP-1 agonists do not affect contraception methods that aren’t pills. So, it’s safe to use these other options without any extra precautions when taking a GLP-1 agonist.

Non-urgent advice: I am planning to switch from one type/brand of GLP-1 to another, does the contraception advice remain the same?

If you are changing to tirzepatide (Mounjaro) from any other GLP-1 agonist, use condoms for four weeks after switching and for four weeks after any dose increase. Keep taking your pill too. Or, you might want to switch to a different type of contraception that isn’t a pill while using tirzepatide.

Non-urgent advice: I need emergency contraception and I’m taking a GLP-1 agonist; will it work?

We don’t know yet if GLP-1 agonists affect emergency contraception pills. The copper IUD (coil) is the best emergency contraception and isn’t affected by diarrhoea or vomiting. If you need emergency contraception, tell your healthcare provider about all the medicines you’re taking, including GLP-1 agonists.

Non-urgent advice: Can I take a GLP-1 agonist during pregnancy?

It’s important to use good contraception when taking a GLP-1 agonist because these medicines shouldn’t be used if you’re pregnant. If you get pregnant while on these medicines, talk to your doctor. You should also stop taking GLP-1 agonists several weeks before trying to get pregnant. The table below shows how many weeks you should stop the medicine before planning a pregnancy for some GLP-1 agonists.

Medicine	Time to stop before planning a pregnancy
Tirzepatide (Mounjaro)	One month
Semaglutide (Ozempic, Wegovy, Rybelsus)	Two months
Exenatide (Bydureon BCise)	12 weeks

This patient information is based on a leaflet from the Faculty of Sexual and Reproductive Healthcare (FSRH).

_{This is for information only and should not be a substitute for seeking medical advice. Decisions regarding your contraception choices should always include discussion with a healthcare professional, particularly if you have any questions or concerns. No contraception is 100% effective and there is always a risk of pregnancy. The Faculty of Sexual and Reproductive Healthcare bears no liability for the choices an individual makes regarding contraception or the outcome of their decision.}

Visit the FSRH website