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Vardenafil's indications and contraindications are the same as with other PDE5 inhibitors; it is closely related in function to sildenafil citrate (Viagra) and tadalafil (Cialis). The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom's position and the change of sildenafil's piperazine ring methyl group to an ...
Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 to 30 minutes. As with most prescription ...
When used as directed to treat ED, sildenafil is safe and effective for most men. However, like any drug, it has potential side effects and drug interactions that are important to consider before ...
Whether you’re a senior in high school or a senior-living resident, you’ve likely heard of Viagra (sildenafil) — the original medication for ED. Most men and women know at least vaguely what ...
Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.
Erectile dysfunction (ED), also referred to as impotence, is a form of sexual dysfunction in males characterized by the persistent or recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity.
For example, headache — the most common side effect of most oral ED medication — was reported by 21 percent of men who used sildenafil citrate in clinical trials at a 50mg dosage.
The most commonly available PDE5 inhibitors are sildenafil (Viagra), [14] vardenafil (Levitra), [15] tadalafil (Cialis), [16] and avanafil (Stendra). [17] PDE5 inhibitors are not routinely prescribed as first line treatment for erectile dysfunction. This is as they cause unwanted side effects like hair loss, headache, and nausea (among others ...
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