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GB-NON-02457 | Date of Preparation: April 2020



The contraceptive injection is a single injection of progestogen, which prevents pregnancy for 8 or 13 weeks, depending on the type.1


Injection key facts

It can be a good choice for birth control if you find it difficult to remember to take a pill at the same time every day. It is over 99% effective if used correctly.1 However, you do need to remember to have a repeat injection before it expires or becomes ineffective.1


Contains hormone progestogen1


Lasts for 8 or 13 weeks, depending on the type of the injection1


Safe to use while breastfeeding1

  • If used correctly, it is over 99% effective1
  • Some women find the injection reduces heavy, painful periods and for some, it may also help with premenstrual symptoms1
  • One injection will last for weeks1
  • Women may have changes in periods, which may become more irregular, heavier, shorter, lighter or stop altogether1
  • After the injection wears off, it can take up to 1 year for your fertility to return to normal, so it may not be suitable if you want to have a baby in the near future1

The pros and cons listed are not exhaustive. Talk to your doctor or nurse for more information.

Common questions

Who can’t use the injection?

This option is suitable for most women. It may not be suitable if you have certain medical conditions – your doctor or nurse can advise you about whether it’s right for you.1

How is the injection given?

There are different types of injection. Some can be done by yourself and some are done by a doctor or nurse. Where it is injected will vary depending on the type. It can be in done in your buttock (bottom), upper arm or abdomen (tummy).1

Similar contraceptive types

This contraceptive is a type known as long-acting – for more contraceptives like this, click below


Tell me more


Tell me more


Tell me more

So what do I do now?

Now you have a few options for types of contraception that might be right for you, you should have a chat with a GP/doctor or nurse.


Sexual health clinic

Find and visit a contraception clinic near you for information about your available choices.

Find out more


Pop into your local pharmacy and ask about your options.

Find a pharmacy

GP clinic

Make an appointment with your nurse or doctor so you can chat about what options are best for you.

Find a GP

You may want to download information on your options to help with your discussion.

Download now

PDF - 0.5MB

Reporting of Side Effects: If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in the package leaflet. You can also report side effects directly via the Yellow Card Scheme at By reporting side effects you can help provide more information on the safety of this medicine.


  1. NHS contraception guide: Contraceptive injection. Available at: (Last accessed May 2019).
  1. Merriam-Webster medical dictionary. Available at: (Last accessed September 2019).

Contraceptive Match is an awareness campaign which has been fully funded and developed by MSD.

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