Viagra, Levitra, Cialis - how they work

Medications such as Viagra, Levitra, and Cialis help initiate and maintain erection by relaxing the corpus cavernosum smooth muscle in your penis. Viagra (sildenafil) is the oldest of these drugs. Levitra (vardenafil) similarly enhances penile blood flow and, more recently, Cialis (tadalifil) has been marketed as the "weekender" for its long-lasting results. All three medications enhance blood flow to the penis by blocking the PDE-5 enzyme. These medications can be used for ED whether its cause is physical, psychological, or medication related.

It appears that these medications are approximately equal in efficacy. About 60 - 85% of the time, when you take the drug and there is adequate penile stimulation, you will have an erection sufficient for intercourse.

There are some differences in the medications. For example, Viagra and Levitra work in about 30 to 60 minutes, whereas Cialis works in as little as 15 to 30 minutes. Cialis and Levitra can be taken with food, but Viagra's effect is slowed by a high-fat meal. The erection-enhancing effect may last for approximately 4 hours with Viagra and Levitra and 24 to 36 hours with Cialis. The blue vision or light sensitivity some men experience with Viagra and Levitra does not occur with Cialis. Each medication sometimes (5 - 15% of men) has side effects such as headache, facial redness, upset stomach, and sinus congestion. Cialis also blocks an enzyme that is found in smooth muscles of internal organs, which may explain why Cialis's most troublesome side effect is back pain in 5 - 6% of men. None of the three medications can be taken safely with nitrates.

The choice of medication will depend upon your and your doctor's preferences as well as your partner's input - her feelings and preferences are vital. Remember that a medication's effect can vary person to person. With your doctor's supervision, try the one of your choice and adjust the dose or try another to seek the effect you want. Remember, it is crucial to integrate the medication into your couple sexual relationship.