Semef-Spas Tablet is a prescription medicine that helps to provide symptomatic relief from menstrual (period-related) pain and cramps. It is also used to treat abdominal pain by relieving spasms of the muscles in the stomach and intestines. Semef-Spas Tablet should be taken with food. This will prevent you from getting an upset stomach. The dose and duration will depend on what you are using it for and how well it helps your symptoms. Use it regularly and do not discontinue using it until the doctor tells you. It may cause some common side effects like dizziness, dryness in the mouth, blurred vision, nausea, and sleepiness. If you experience any of such side effects that do not go away or get worse, you should let your doctor know. Your doctor may be able to suggest ways of preventing or reducing the side effects. In general, you should try to use the smallest amount necessary to control your symptoms. Before using the medicine, you should tell your doctor if you have any kidney or liver problems, or if you are taking any other medicines. Pregnant and breastfeeding women should also consult their doctors before using the medicine.