Kamagra 100 mg tablets are used to treat Erectile Dysfunction in men, which is defined as the inability to achieve or maintain a hard erect penis suitable for sexual activity due to insufficient blood flow into the penis. The blood vessels in the penis relax, boosting blood flow and causing an erection, which is a natural response to sexual stimulation. Kamagra 100mg tablets, on the other hand, will only work if you are sexually stimulated.