Sildenafil is the active ingredient in Cobra, Sildenafil ensures that certain blood vessels are widened which promotes erection.
The blood vessel dilation is initiated by substances released into the penis upon sexual stimulation. Sildenafil inhibits the degradation of these vasodilators.
They therefore stay longer and in larger amounts in the penis. As a result, the penis becomes more rigid and stays stiff.
Sexual stimulation is required for the operation.
The action of Sildenafil begins after half an hour and reaches a maximum after about one hour and disappears after about four hours.

Take the Cobra tablet approximately 1 hour before sexual activity.
One to one hour after ingestion, you will receive an erection.
The erection disappears after about 4-5 hours.

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