Answer:
There are no safety concerns about using the levonorgestrel morning after pill more than once, but that's a terribly expensive and ineffective way to prevent pregnancy. If you had unprotected sex or some birth control accident multiple times, you can use the levonorgestrel morning after pill multiple times. But how often is your regular birth control failing. If it is happening on a regular basis you need a more reliable form of birth control that is easy for you and your partner to use. Emergency contraception only reduces the risk of pregnancy by 88-95%. As a back up to regular birth control, that level of protection is a relief to thousands of couples every week, but it is not effective enough to be used as your only method of preventing pregnancy.
The label for ELLA states that it should not be used more than once in the same cycle, because there have been no studies of repeated use.
Contrary to urban legend, the morning after pill does not stop working and does not cause fertility problems if taken multiple times. But the more unprotected sex you have, the more likely it is that you'll get pregnant.
But remember that repeated unprotected sex can limit your future fertility by exposing you to sexually transmissible infections. If you are serious about protecting your fertility, use condoms whenever you have sex.
For peer-reviewed information on the safety of using the morning after pill repeatedly, see the website referenced in "related links" for this question.
Nothing except you have prevented yourself from getting pregnant. You may see a ripple in your normal cycle but it will return to normal within a cycle or two.
Yes, but there are more effective ways of preventing pregnancy. Contact your health care provider this week to talk about options.