It's common knowledge that the makers of Malegra 100 Mg promise a faster-acting, more potent version of Viagra (the active ingredient in the popular erectile dysfunction drug Sildenafil). But what few people realize is that the manufacturer of Malegra includes the ingredient methotrexate, also known as fenfluramine, which is an antihistamine and can have some side effects as well. In fact, methotrexate and its derivatives have been found in a number of clinical trials to reduce asthma-related reactions and the lower incidence of wheezing in asthmatics. For these reasons, it's important to talk with your doctor before taking any kind of medication, even over-the-counter medicines such as Malegra.