Viagra vs. Cialis vs. Levitra: Differences and Similarities

Ready to combat ED (erectile dysfunction), but confused about what kind of inhibitor of PDE-5 to take? You are not the only one. 3 FDA approved PDE-5 inhibitor, Viagra (sildenafil citrate) is certainly the most popular, but popularity should not only be a determining factor. The most recently approved Cialis (tadalafil) and Levitra (vardenafil hydrochloride) are also very effective and much safer alternatives, although it can not yet be as popular. The problem for most people is indeed to decide the best alternative for them.

To begin with, all three drugs are PDE-5 inhibitors are helping them relax compromised or hardened arteries penis thereby allowing more in the flow of blood to the penis and subsequently cause an erection. All three drugs also help maintain high levels of cGMP in the penis. What's cGMP? It means cyclic guanosine monophosphate and it is an incredible substance, which is naturally produced by the tissue of the penis in response to sexual stimulation, which helps vascular and muscle relaxation. When high levels of cGMP are present, penile arteries become relaxed and natural and rigid erection occurs.

Unfortunately, in most of the men suffering from ED, PDE-5 enzyme neutralizes any available cGMP and cGMP without an erection become flaccid or will not occur at all. This is where PDE-5 inhibitor, such as Viagra, Levitra and Cialis come in. These drugs "inhibit" or block unwanted PDE-5 and, therefore, took very cGMP are allowed to remain within the penis occurs after sexual stimulation , and then Facilitating the process of erection and conservation of penis erect. The question is: "Because all of these drugs have the same effect, why should I choose one over the other?"

Let's compare the three PDE-5 inhibitors side by side to determine their differences:

Manufacturers: Viagra: Cialis Pfizer: Eli Lilly and ICOS Levitra: GlaxoSmithKline and Bayer

Generic Name: Viagra: Sildenafil Citrate Cialis: tadalafil Levitra: vardenafil hydrochloride

Dosage: Available and recommended: Viagra: 25 mg, 50 mg and 100 mg tablets. Most patients start using the pill and 50 mg or increase or decrease the dose of drugs based on tolerance and / or efficacy. Most health professionals recommend taking Viagra 1 hour before sexual activity, but studies have shown that Viagra can be effectively taken anywhere from 30 minutes to 4 hours before having sex.

Cialis: 5 mg, 10 mg and 20 mg tablets. We recommend starting with 10 mg tablets and either increase or decrease the dosage depending on the results achieved. Traditionally, Cialis tablets can be taken anywhere from 30 minutes to 12 hours prior to sexual activity. Cialis soft tabs (which must go through the process of digestion), can be taken about 15 minutes before sexual activity.

Levitra: 2.5 mg, 5 mg, 10 mg and 20 mg. Most people for starting the pill and 10 mg both work their way upwards or downwards depending on the results achieved. Levitra should be taken anywhere from 25 minutes to 1 hour before sexual activity, although some experts say sex can be started and already 15 minutes.