The formula of Kamagra 100 mg is based on Sildenafil Citrate as an active substance. This ingredient blocks the enzyme, which is involved in the regulation of the blood flow in the genitals. When the concentration of this enzyme is eliminated, the blood flow to the penis is increased. That ensures that a man can easily get an erection within a substantial time. More to the point, Kamagra 100 mg drug is a reliable means for curing pulmonary arterial hypertension as well. Sure, today, there are also other ED treatments discovered. They belong to the same class of drugs and act identically. Nevertheless, Sildenafil Citrate is a number-one choice among customers. And it is included in Kamagra. Kamagra 100 mg should not be used after two years from its manufacturing date. It should be kept in its original package in a cool, dry place. Do not take Kamagra Tab 100 mg after the date on the packet says not to.