Cialis, Levitra, and Viagra work by a similar mechanism to cause erections. With Viagra, the effects last approximately 4 hours. Cialis works a bit faster. Levitra works a little longer than Viagra.
Cialis, Levitra, and Viagra work by a similar mechanism to cause erections. With Viagra, the effects last approximately 4 hours. Cialis works a bit faster. Levitra works a little longer than Viagra.
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