Additionally, erectile dysfunction and impotence are treated with it. Only men who are at least eighteen years old should use this medication. Sildenafil is an ingredient in this medication that helps men's penile tissues receive more blood flow and relax their muscles. Kamagra effervescent can be purchased from our store. You should take this medication with water; do not crush or chew the tablet. Take this medication an hour before sexual activity. This medication has a 3 to 6-hour half-life, so avoid taking it too often.