Combined Oral Contraception
Reliability
Depends on the individual taking it properly.
99% effective.
One woman in 100 will get pregnant a year.
How it works
Each pill contains two hormones (oestrogen and progestogen).
Taken daily at the same time for 21 days and then seven days not taking
it at all.
Stops a woman from releasing an egg each month (ovulation).
Possible Side Effects
Major blood clots (thrombosis) - rare.
Minor - temporary nausea / headaches / mood changes / breast tenderness
/ weight gain or loss.
Advantages / Benefits
Often reduces period pain and bleeding.
Often reduces PMT.
Protects against cancer of womb.
Protects against some pelvic infections.
Reliable if taken properly.
Suitability
- not for all women
- not for smokers over 35
- not when breast feeding
- not for those with certain types of migraine
- not for those with a history of blood clots
- not for those who easily forget to take pills
- for some women up to age of menopause
Who can provide it?
GP or Sexual Health Service
Comments
not effective:
- if next packet is not started on time
- if a pill is taken 12 hours late
- with some antibiotics
- after vomiting or severe diarrhoea
- with some other drugs




