Hi, How many weeks pregnant are you now? Consult your doctor. She will examine and assess to make sure that you do not have contraindications for this medicine and then prescribe it for you. Cytolog can cause severe diarrhoea, nausea and vomiting. Your doctor will discuss with you about these side effects and prescribe medicines for the same. Cytolog is secreted through breast milk. Its concentration in breast milk reduces to very minimal level after 6 hours of taking the tablet. There are no reports of problems in breast fed children of mothers who took Cytolog. However since Cytolog can cause serious side effects like severe diarrhea I advise you to extract the breast milk every 3-4 hours and discard it during the duration of taking Cytolog and until 8 hours after the last dose. I hope I have answered to your satisfaction. If you have any further concerns do contact me through Healthcare Maggic If you want to postpone pregnancy, I advise you to discuss with your doctor and start regular effective contraception like hormone contraception or get an intrauterine devise inserted. I hope I have answered to your satisfaction.