Overview
No. Wegovy® (semaglutide), prescribed through MedExpress, has not been shown to make hormonal contraception, such as the birth control pill, less effective. Clinical studies have found that taking semaglutide does not meaningfully change the levels of contraceptive hormones in your body.
Use this article when you want to:
Understand why Wegovy® itself does not interfere with the contraceptive pill
Learn how certain side effects could indirectly affect how well your body absorbs the pill
Get guidance on planning a pregnancy while taking Wegovy®
Know how to stay protected against pregnancy while on treatment
Direct Interaction
Research indicates that Wegovy® does not interfere with how your contraceptive pill works biologically. The hormones in your birth control should remain at effective levels in your system while you are using Wegovy® for weight loss.
The Impact of Side Effects
While Wegovy® doesn't block the pill, certain side effects can indirectly affect how well your body absorbs oral medication. Much like a stomach bug, if you experience the following while taking Wegovy®, your contraception may be compromised:
Vomiting: If you vomit shortly after taking your contraceptive pill, your body may not have had enough time to absorb it properly.
Severe diarrhoea: Intense digestive upset can also speed up the transit of medication through your system, potentially reducing its effectiveness.
In these instances, follow the "missed pill" guidance provided with your specific contraceptive brand, or use a backup method (such as condoms) until you are well again.
Planning for Pregnancy
If you are planning to become pregnant, you should stop taking Wegovy® at least two months before trying to conceive. Speak with your GP or another healthcare professional to discuss transitioning off Wegovy® safely.
Staying Protected
It is important to continue using reliable contraception while taking Wegovy® if you do not plan to become pregnant. While Wegovy® itself is safe to use alongside the pill, staying mindful of how your body reacts to the treatment ensures you remain fully protected.
If you experience persistent digestive side effects on Wegovy®, you may want to discuss alternative, non-oral contraceptive methods (such as the implant or coil) with your GP, as these are not affected by digestive upset.
Need Further Support?
If you still need help after reviewing the information above, additional assistance is available.