These days, men are treated for a variety of sexual problems, such as impotence, erectile dysfunction, and premature ejaculation. One of Kamagra Oral Jelly ingredients, sildenafil, helps men's penile tissue relax. You can take this medication with or without food. The effects of Kamagra 100mg oral jelly take four to six hours to manifest. Do not chew or crush the tablet; instead, take it with water.