Parlutal 2.5mg Tablet is similar to the progesterone hormone naturally produced by the body. It regulates periods, stops irregular bleeding, and helps with withdrawal bleeding in cases of amenorrhea (unusual stopping of menstrual periods). Parlutal 2.5mg Tablet should be taken as your doctor's advice. Your doctor will decide how much you need to take and for how much time. You may take it with or without food but better to take it at a fixed time. You should take this medicine for as long as it is prescribed for you. The most common side effects of this medicine include headache, abdominal pain, weakness, and dizziness. If any of these bothers you, let your doctor know. There may be ways of reducing or preventing them. It may also cause irregular periods, bleeding, or spotting in between menstrual periods. Let your doctor know if this occurs frequently. Before taking this medicine you must let your doctor know if you ever had any problems like bleeding or have a history of blood clots, stroke, heart attack, liver problems, or bleeding problems. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Pregnant and breastfeeding women should not take this medicine.