One type of Kamagra Effervescent used to treat erectile dysfunction (ED) is Kamagra Effervescent. This Kamagra variant is available as effervescent tablets that dissolve in water before consumption. Like other Kamagra medications, it has the same active ingredient, sildenafil citrate. Usually, sildenafil begins to act 30 to 60 minutes after consumption. The effects have a maximum duration of 4-6 hours. The standard dosage of Kamagra Effervescent tablets is 100 mg of sildenafil citrate. Observe the dose recommendations on the package or as given by your healthcare provider.