You can take Kamagra 100mg oral jelly tablets with food or empty stomach. It must be taken exactly as prescribed by your physician. The recommended amount of time to wait before having sex is one hour. Work takes different amounts of time for different people, but it often takes 30 to 1 hour. You must be sexually excited in order for this medication to assist you in achieving an erection. If you do not have erectile dysfunction, however, you should not take this medication. It must be taken no more than once a day.