Malegra 100 tablets have been used primarily to treat sexual problems. This is a problem in which men are unable to achieve an erection despite being sexually aroused during sexual activity. This can be a serious problem if left untreated. Very good results can be obtained by taking this medicine only once. This drug has proven to be very effective compared to other drugs. Many men take this medicine to treat their sexual problems. The drug is usually effective for 5-7 hours.