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Sildenafil, tadalafil, vardenafil, and Stendra are all safe and effective medications when used as prescribed. However, all medications for ED have the potential to interact with other medications
Tadalafil. The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil can ...
Tadalafil. The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil ...
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 ...
Although sildenafil, vardenafil, and tadalafil all work by inhibiting PDE5, tadalafil's pharmacologic distinction is its longer half-life (17.5 hours), [21] compared to sildenafil and vardenafil, which are both 4–5 hours. [22] This translates to a longer duration of action, which is partly responsible for "The Weekend Pill" nickname.
Sildenafil is a prototype of PDE5 inhibitors that Pfizer launched as Viagra. It was approved by the Food and Drug Administration (FDA) in 1998 as the first oral medicine for erectile dysfunction. Later, in the year 2005, it was approved for the treatment of pulmonary arterial hypertension. [2] Vardenafil and tadalafil were discovered in 1990.
Tadalafil. The active ingredient in Cialis, tadalafil is a long-lasting medication that can provide relief from ED for up to 36 hours. Vardenafil. The active ingredient in Levitra, vardenafil can ...
Sildenafil, Tadalafil, Vardenafil [13] 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 .