The doses of Kamagra range between 25mg to 100mg 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. You may find that Kamagra will take longer to work if you take it with a heavy meal. Swallow the tablet whole with water. Kamagra will only work if you are sexually excited. If you take too much you are more likely to experience side effects.