Sildenafil is an ingredient in Kamagra 100. It is a medication that works well for treating male erectile dysfunction. A guy with erectile dysfunction is unable to get or keep an erection strong enough for sexual activity. Blurred vision, headaches, nausea, dizziness, and flushing are a few of Kamagra 100’s side effects.  It is advised that you take the tablet 30 to 60 minutes before sexual activity. But you can also take it up to 4 hours before having sex. During Kamagra 100 treatment, avoid operating machinery or driving.