Cramps often result from vigorous exercise, trauma to the muscle, or keeping the leg in an awkward position for too long, such as sitting in a crowded theater. Other causes can include medications such as birth control, diuretics (which are often prescribed for people with high blood pressure) and steroids. Analgesic balm or a patch, both sold over-the-counter at pharmacies, can provide further relief. OTC pain relief medications that are formulated to treat menstrual cramps, such a Pamprin and Midol, can be an effective treatment for bad leg cramps. Additionally, certain vitamins and minerals impact muscle function, particularly potassium and magnesium. A significant body of research has found that increasing your magnesium intake can help with the frequency of night time leg cramps,