Put 1 tablet of Viagra Sublingual under the tongue and wait for complete dissolution. Do not try to swallow a pill, the effect after swallowing may be weaker. The tablet itself will dissolve in the sublingual region. The time for complete dissolution of the tablet can vary from 1 to 5 minutes. The action of the drug starts within 20-30 minutes after intake, the activity of the preparation is gradually reduced within 4 hours of admission. You need sexual arousal or physical stimulation of the penis.