Kamagra 100 is a drug made from a chemical ingredient called sildenafil citrate. This drug is very popular, successful, and widely accepted for treating sexual problems like erectile dysfunction. This drug does not cause any side effects. But if taken against a drug, it can cause side effects. This drug has proven to be more useful for a patient who is unable to achieve an erection despite being sexually aroused in men. This drug has proven to be the best pill for such people.