The active ingredient in Kamagra Effervescent, sildenafil citrate, is used to treat erectile dysfunction in patients. Blood flow to the penis is increased with Kamagra Effervescent, enabling a man to experience sexual stimulation-induced blood flow similar to what occurs naturally. The penis's arteries widen during an erection as a result of increased blood flow in and less blood out. Effects of Kamagra Effervescent typically become apparent 30 minutes to 1 hour after ingestion, with a generally rapid beginning of action. Everybody's experience with it is different, but generally speaking, the effects endure between four and six hours. Overdosing on medication won't always make the effects last longer and may even raise the chance of negative side effects.