Kamagra 100 contains sildenafil citrate, the same active ingredient found in many popular erectile dysfunction (ED) medications. It works by boosting blood flow to the penis during sexual stimulation, which aids men in achieving and maintaining erections. Kamagra 100 is normally given 30-60 minutes before intercourse, and its effects might last several hours. Common adverse effects include headaches, flushes, nasal congestion, dizziness, and stomach discomfort. Because sildenafil interacts with certain