Levonorgestrel is a transdermal form of estrogen that is used to prevent pregnancy after unprotected sex. Women can apply a transdermal patch to their skin after having sex in order to cause a mass influx of estrogen and prevent pregnancy. This medication is meant to be used for emergencies only.
Levonorgestrel is not meant to be used as a regular form of birth control. Women need to take their regular birth control medication on a daily basis after taking this medication. The medication does not protect against HIV or other sexually transmitted diseases.
This medication can cause strokes or heart attacks in women over the age of 35, especially if they smoke. Women are also at greater risk for breast cancer and endometrial cancer if they take this medication.