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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 ...
Cialis (tadalafil) has a half-life of 17.5 hours, meaning this drug lasts up to 36 hours after it’s consumed. Levitra (vardenafil) has a half-life of four to five hours and remains active in the ...
Viagra usually starts working 30 to 60 minutes after taking it. But simply swallowing the little blue pill won’t automatically make you hard — you still have to be aroused, either through ...
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.
PDE5 inhibitors are contraindicated within 24 hours (or 48 hours with tadalafil) of taking alpha-blockers, soluble guanylate cyclase stimulators, or nitrate medications such as isosorbide mononitrate or isosorbide dinitrate. [1] Concurrent use of these medications can lead to life-threatening low blood pressure. [5]
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.
The Best ED Medication for Men: Pros & Cons of Top ED Pills. Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world.
One advantage Cialis has over Viagra and Levitra is its 17.5-hour half-life (thus Cialis is advertised to work for up to 36 hours, [32] after which time there remains approximately 25% of the absorbed dose in the body) when compared to the four-hour half-life of sildenafil (Viagra).
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