There are some side effects associated with ECPs. These are primarily nausea and vomiting. These can be controlled with some medication to control vomiting. Continuous use of a reliable contraception is recommended. The use of condoms can help reduce the spread of sexually transmitted diseases.
Emergency contraception is a short-term option for the prevention of pregnancy.
Accidents do happen, but the responsible use of contraception is the best way to reduce the chance of an unintended pregnancy.