<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi Doctor, I have been taking Primolut-N to delay my period for the past few days one tablet, twice a day. I had unprotected sex yesterday and want to take the I-pill. Please tell me if I should or should not take it, and if there will be any side-effects?  <response>: Hi, It may lead to side effects. Primolut-N contains the hormone progesterone, which prevents your womb lining from shedding and hence used to delay the periods. It is not a contraceptive hence and cannot prevent pregnancy following an unprotected sex. Barrier methods such as condoms or diaphragm are recommended following an unprotected sex while taking Primolut-N. Now, since you have had unprotected sex yesterday, the emergency contraceptive pill I pill may be taken as early as possible in order to achieve maximal efficacy. When you are taking pill along with Primolut-N it can affect your menstrual cycles causing irregular bleeding or spotting, stomach upset, vomiting, breast discomfort, changes in sexual desire, edema, etc. Hope I have answered your question. Let me know if I can assist you further. 