Malegra 100 works by increasing blood flow to the penis. When sexually stimulated, the enzyme PDE5 breaks down a molecule called cGMP that helps relax the blood vessels in the penis. Sildenafil inhibits PDE5, allowing cGMP to accumulate and thus relax the smooth muscles of the penis, enabling better blood flow and facilitating an erection. This medication should be taken about 30-60 minutes before sexual activity, with effects lasting for up to 4-6 hours. However, it's important to note that an erection will only occur with sexual stimulation. Malegra 100 mg is available at pharmacies with a doctor's prescription. It can also be found online, but it is important to purchase from reputable sources to ensure that the medication is genuine and safe. https://www.genericday.com/malegra-100-mg.html