Kamagra Oral Jelly generally takes about 30 to 60 minutes to start working after ingestion. The active ingredient in Kamagra, sildenafil citrate, helps increase blood flow to the penis, which is necessary for achieving and maintaining an erection. However, it's important to note that Kamagra requires sexual arousal to be effective, so simply taking the medication without sexual stimulation won't produce an erection. The onset of Kamagra’s effects can vary depending on several factors, including your metabolism, overall health, and whether you've eaten recently. Taking Kamagra 100 on an empty stomach can lead to faster absorption and quicker onset, while a heavy or fatty meal might delay its effectiveness.