Generally, Kamagra Oral Jelly helps men get an erection. This jelly stimulates men for sex. This jelly works to increase stamina in men. This jelly starts working half an hour after taking it. The effect of this jelly lasts for 4 to 5 hours. Use this jelly as per doctor's advice. If you have any kind of allergy then inform the doctor about it. This jelly can be taken before meals or after meals but it will be more effective if taken before meals.