By blocking PDE5, Cialis increases cGMP levels, thereby relaxing smooth muscle and improving blood flow to the penile arteries.

Libido, often synonymous with libido or the frequency of s*xual desire, is the most common s*xual dysfunction in women.

This blood stays in place, keeping the p*nis erect. If this blood isn't kept in place or if the muscles don't relax, erectile dysfunction occurs.

This fluid gives the eye its shape and nourishes its cells. An imbalance in the amount of fluid inside the eye can lead to potentially dangerous high or low eye pressure.

This solution has certain properties that also make it useful as a cosmetic solution to promote the growth of longer, darker, and thicker eyelashes.