Majority of men all over the world use Malegra 100mg drug to deal with their sexual impotence. Most importantly, it is fundamental to note that you should take only one dose of Malegra 100(Sildenafil Citrate) within 24 hours. Taking this medicine is very easy; Make it with just a glass of water. Usually the drug starts working in 30-50 minutes. But in some cases, it starts working in 15-30 minutes.