Specifications: Kamagra is used to treat erectile dysfunction, more commonly known as impotence, in men. Kamagra will not increase your sex drive. Kamagra works by relaxing the blood vessels in the penis when you are sexually excited. This allows blood to flow into your penis when you are sexually excited, allowing you to get an erection the natural way. Kamagra will only work if you are sexually excited. How do you take it? The doses of Kamagra range between 25 mg to 100 mg to be taken about 1 hour before you expect to have sex. Do not take more than one dose of Kamagra per day. The amount of time Kamagra take to work varies form person to person, but normally takes between half an hour to one hour. What are the side effects? The most common side effects experienced with Kamagra are headache, flushing, indigestion, stuffy nose, changes in vision such as blurring, a blue colour to your vision, diarrhoea, urinary tract infection.