Yes! Emergency contraceptive pills, most popular of which is the Plan B MAP are very harmful. It is not suggested you take them more than once because they have serious side effects.
Even David A Grimes who was a presenter for Plan B’s manufacturer before the FDA advisory committee, acknowledged in a 2002 interview that MAP use has a serious negative effect on a woman’s menstrual cycle:
World Health Organization WHO deemed routine post-coital contraception as “unsuitable " primarily because of the high incidence of cycle disturbances And that's just the beginning of the long list of side effects which include:
- fatigue
- abdominal pain
- big increase in weight
- breast tenderness
- dizziness
- nausea
- back pain
- depression
- ovarian cyst enlargement
- gallbladder disease
- high blood pressure
- pelvic pain
- respiratory disorders
- increased risk of ectopic pregnancy
- irregular bleeding inbetween periods
- feeling sick
If you really need to, I guess you could use it once but, with these kind of side effects I wouldn't suggest anyone to use it a second, or third time. But yet, still many do and get hurt in the end.