This medicine is used to treat erectile dysfunction in men. It relaxes the bloated part and relaxes the cardiovascular muscle. You work more in sex with your partner. It has a long-lasting effect of 4-6 hours. It is necessary to take the drug 1 hour or 30 minutes before you engage in sexual activity. Sildenafil is loved by people. Only people suffering from erectile dysfunction should take the medicine. kamagra side effects The effect of fever and nausea and feeling hot does not last long.