This medicine works in achieving erection for a long duration. It removes the problem of cardiovascular weakness. It naturally leads to sex. Sildenafil is a drug known to people. Which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Take the medicine within 1 hour or 30 minutes before engaging in sexual activity. You are suffering from another disease. Take medicine as per your doctor’s advice. This medicine takes effect for 4-5 hours. It does not affect more than 5 hours. It causes overheating, nausea, and the illness's kamagra side effects.