If you are having problems with your sex life, such men are unable to keep a sexual erection for an extended period. Men should use Kamagra effervescent tablets to remedy this issue. These tablets contain the active component Sildenafil. This medication allows men to have a long-lasting erection. These tablets are administered 30 minutes before sexual intercourse. The effects of Kamagra effervescent tablets last for 4 to 5 hours.