Do I have to fast for two hours after taking the pill?

It is best to fast for two hours after taking the pill, because eating after taking the pill may lead to a decrease in the efficacy of the drug. Contraceptives contain a lot of estrogen and progesterone, and may cause symptoms such as dysmenorrhea, irregular menstruation and endocrine disorders after taking them. Note: Emergency contraceptives should not be taken more than three times a year.