What The Doctor Says
Each such tablet contains 1,500 mcg of levonorgestrel, a synthetic hormone.
- Statutory warning: Use only in emergency situations, not as substitute for condoms or low-dose oral contraceptives. Does not prevent sexually transmitted diseases such as AIDS.
- Possible side-effects: Vomiting, nausea, fatigue, abdominal pain, diarrhoea, dizziness, headache, breast tenderness, early or late onset of next period, increased menstrual bleeding and vaginal haemorrhage. Some women might suffer ectopic pregnancy.
- Failure Rate: 95% effective if taken within 24 hours of intercourse, 85% if taken within 25-48 hours; 58% if taken after 49 but before 72 hours. If used mid-menstrual cycle, one in every 20 women is likely to conceive.
- Precaution: Use barrier methods such as condoms for three weeks. If period does not start, then the possibility of ectopic pregnancy or toxicity to the foetus needs to be assessed.