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Side Effects of Viagra Use. Like any medication, side effects of Viagra may come with its many benefits. ... Because of the risks of this medication, people taking alpha-blockers, over-the-counter ...
As we mentioned, most of the time, side effects from ED medications get better over time. But because Cialis has a much longer half-life than Viagra, you may experience Cialis side effects for longer.
Viagra could lead to more serious side effects, such as: Priapism (a painful, long-lasting arousal) Vision loss. Chest pain. Flu-like symptoms. Heart attack. Stroke. Dizziness. Sudden low blood ...
Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9]
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.
Over-the-counter (OTC) drugs are medicines sold directly to a consumer without a requirement for a prescription from a healthcare professional, [1] as opposed to prescription drugs, which may be supplied only to consumers possessing a valid prescription.