Viagra needs to be taken precisely as it was recommended by a qualified doctor or physician. Never take it in larger doses or for a longer duration than what the medical professional recommends. Intake of Viagra varies according to a person’s current impotence problem. 정품비아그라 Furthermore, remember that Viagra functions just when there is sexual stimulation. This implies that erection is not possible with just a simple intake of the Viagra tablet. Do not expect an erection if there is no physical stimulation.