Hi and welcome to HCM
Postinor 2 contains the active ingredients
levonorgestrel (progestogen-only contraceptives). Used for emergency contraceptive only. Postinor-2 is not intended as a regular method of
contraception. It is used to prevent
pregnancy when taken within 72 hours of
unprotected intercourse and your girl friend has taken within 2 hours of unprotected sexual intercourse, so chances of failure is less and it will prevent pregnancy.
Common side effects of postinor 2 are
tiredness, nausea and vomiting. Some patients have also experienced stomach pain, diarrhoea,
dizziness, headache, tender breasts, increased vaginal bleeding and skin reactions
Periods are expected within 3 weeks of taking the tablets and if it wont happen you may be pregnant and must see your doctor, even though pregnancy test is negative its better to consult a local doctor if periods wont return after 3 weeks of using this tablet.
But in some cases after taking this tablet periods may be delayed.
If pregnancy gets ruled out and if you are not ready for pregnancy, but intend to remain sexually active, you should consider getting started on suitable regular birth control measures to be protected (after periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact if you are not ready for pregnancy
Regards
Dr Santosh