The progestogen-only pill
The progestogen-only pill, often called the mini-pill, is a type of oral contraception that contains only the hormone progestogen. It is suitable for many people who cannot take oestrogen, including those who are breastfeeding.
www.contraceptionchoices.org/FRSH_CC/Contraception-Methods/Mini-Pill.aspx
How does the mini-pill work?
The mini-pill prevents pregnancy by:
- Thickening cervical mucus, making it harder for sperm to reach an egg
- Thinning the lining of the womb, which reduces the chance of implantation
- Sometimes suppressing ovulation, depending on the type of mini-pill
How effective is it?
- Over 99% effective when taken at the same time every day
- Around 91% effective with typical use (if pills are missed or taken late)
How do I take the mini-pill?
- Take one pill at the same time every day
- It must be taken at the same time each day to remain effective
- There is no 7-day break; it is taken continuously
Your GP or nurse will explain how to start your mini-pill safely.
When does it start working?
- If started within 5 days of the start of your period → protected immediately
- If started at any other time → use additional contraception (e.g., condoms) for 2 days
Advantages of the mini-pill
- Suitable if you cannot take oestrogen
- Can be used while breastfeeding without affecting milk supply
- Taken daily, so easily reversible — fertility returns quickly after stopping
- Can reduce menstrual problems for some users
Possible side effects
Some people may notice:
- Irregular or unpredictable bleeding
- Spotting between periods
- Breast tenderness
- Headaches
- Mood changes
Side effects often settle after the first few months.
Missed or late pills
The mini-pill is time-sensitive:
- If you are more than 3 hours late taking a pill, you may need to use additional
contraception for 48 hours - Follow the instructions provided in your pill leaflet or contact the practice if unsure
Important information
- The mini-pill does not protect against sexually transmitted infections (STIs)
- Certain medications may reduce its effectiveness — always check with your GP or
pharmacist - Vomiting or severe diarrhoea can make the pill less effective
Our services
We offer:
- Mini-pill reviews and prescriptions
- Advice on side effects
- Support for switching methods if needed
All consultations are confidential.
When to seek advice
Contact us if you experience:
- Severe abdominal pain or persistent irregular bleeding
- Signs of pregnancy while taking the mini-pill
- Any other concerns about side effects