The active ingredient in viagra 6mg, sildenafil, belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Under normal conditions, upon sexual arousal, nitric oxide is released into the corpus cavernosum, part of the penis structure. The mechanism of action for Viagra involves the blocking of the PDE5 enzyme, which is predominantly found in the penis. This relaxation allows for increased blood flow into the penile tissues, leading to an erection.
This nitric oxide stimulates the production of cyclic guanosine monophosphate (cGMP), a molecule that causes the smooth muscles in the penis to relax. For instance, it has shown potential benefits in treating pulmonary arterial hypertension (PAH), lisinopril 5 mg brand name a serious condition characterized by high blood pressure in the arteries of the lungs. Sildenafil, viagra 75mg under the brand name Revatio, is approved for the treatment of PAH, where it works by relaxing blood vessels in the lungs to allow blood to flow more easily.
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