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The effect of vardenafil on penile erection after oral administration was clearly demonstrated in the conscious rabbit model. The time course and early onset of activity indicate that it may be useful for treating erectile dysfunction. Potentiation of the effect by the nitric oxide donor sodium nitroprusside implies that it would have enhanced activity during sexual arousal, when nitric oxide is produced endogenously. The clinical development of this product for erectile dysfunction is proceeding.

The effect of vardenafil on penile erection after oral administration was clearly demonstrated in the conscious rabbit model. The time course and early onset of activity indicate that it may be useful for treating erectile dysfunction. Potentiation of the effect by the nitric oxide donor sodium nitroprusside implies that it would have enhanced activity during sexual arousal, when nitric oxide is produced endogenously. The clinical development of this product for erectile dysfunction is proceeding.