Sildenafil Citrate is the main ingredient in Malegra tablets tablets which is used by most men today to treat impotence and erectile dysfunction. Malegra 100 tablet is manufactured in Sunrise Remedies of India. The effect of this tablet lasts for 4 to 5 hours, so this tablet should not be taken more than 1 time in 24 hours. This tablet should not be used by women.