Kamagra effervescent is used to treat men's sexual issues such as impotence and erectile dysfunction. This medication increases blood flow to men's penile tissues. The active element in this medication is sildenafil. This medication is taken 30 minutes before intercourse to allow you to enjoy it with your partner.  This medication can be used before or after meals. Take Kamagra effervescent tablets with water, but do not break or chew them. Follow the doctor's instructions for using this medication. This medication has a 4- to 6-hour impact.