Kamagra 100, a popular erectile dysfunction therapy, contains sildenafil citrate, the same active ingredient as in Viagra. It works by boosting blood flow to the penis, allowing men to obtain and sustain a hard erection during sexual activity. Kamagra 100 is normally taken 30 to 60 minutes before intercourse, with effects lasting up to four hours. Sexual stimulation is essential for the drug to be effective. Common adverse effects may include a headache, flushing, dizziness, and slight stomach discomfort. Always speak with a healthcare practitioner before using to confirm safety and right dosage.