How Does Emergency Contraception Work and When Should You Take It?
Emergency contraception is a safe and effective way to prevent pregnancy after unprotected sex or contraceptive failure, such as a missed pill or condom breakage. Often referred to as the morning-after pill, it provides reassurance and control when your regular contraception hasn’t gone to plan.
In this blog, we will know how emergency contraception works, when it should be taken, and what you should keep in mind.
How Does Emergency Contraception Work?
So, how does emergency contraception work? The main way is by delaying ovulation – the release of an egg from the ovary. If there is no egg available for fertilisation, pregnancy cannot occur. Some types may also make it harder for sperm to reach the egg or for a fertilised egg to implant.
It is important to note that emergency contraception does not cause an abortion and will not affect an existing pregnancy. Instead, it works preventively to reduce the chance of pregnancy before it starts.
When to Take Emergency Contraception
Timing is crucial. The sooner you take it, the more effective it is. Ideally, emergency contraception should be taken within 24 hours, but certain pills remain effective up to 72 hours. In some cases, emergency contraception can be effective for up to five days after unprotected sex, depending on the type prescribed.
If you’re wondering when to take emergency contraception, the simple answer is: as soon as possible. Acting quickly maximises effectiveness and gives you greater peace of mind.
Types of Emergency Contraceptive Pills in the UK
There are two main morning-after pills available in the UK:
Levonorgestrel (Levonelle): Best taken within 72 hours (3 days) of unprotected sex.
Ulipristal acetate (ellaOne): Can be taken up to 120 hours (5 days) after, but works best the sooner it’s taken.
Both are effective, but the right option depends on how quickly you act, any medications you take, and your personal circumstances. A pharmacist can advise you regarding various methods of emergency contraception and help you decide which is most suitable.
Possible Side Effects
Like any medication, emergency contraception can cause side effects. Common ones include:
- Nausea or upset stomach
- Headache
- Pain and cramping
Temporary changes to your menstrual cycle (your next period may come earlier or later than expected)
Most side effects are mild and short-lived. If vomiting occurs within a few hours of taking the pill, you may need another dose, so it’s best to consult a pharmacist.
Where to Access Emergency Contraception
Emergency contraception is available at most sexual health clinics and at many pharmacies, offering both convenience and confidentiality. Pharmacists can advise on the best option for your circumstances and ensure you take it at the right time.
Make the Right Choice When You Need It
Emergency contraception is a reliable option when you need it most, but timing is everything. Acting promptly, being aware of possible side effects, and seeking guidance from a professional ensures the best outcome.
Pharmacies like Maple Leaf Pharmacy provide quick, discreet, and professional access to emergency contraception, helping individuals make informed choices about their reproductive health.

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