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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.
Phosphodiesterase-5. A phosphodiesterase inhibitor is a drug that blocks one or more of the five subtypes of the enzyme phosphodiesterase (PDE), thereby preventing the inactivation of the intracellular second messengers, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) by the respective PDE subtype(s).
Inhibitors of PDE can prolong or enhance the effects of physiological processes mediated by cAMP or cGMP by inhibition of their degradation by PDE. [13] Sildenafil (Viagra) is an inhibitor of cGMP-specific phosphodiesterase type 5, which enhances the vasodilatory effects of cGMP in the corpus cavernosum and is used to treat erectile dysfunction.
It is thought that people with sexual anhedonia have a dysfunction in the release of the chemical dopamine in the nucleus accumbens, the brain's primary reward center.This part of the brain is thought to play a role in pleasurable activities, including laughter, exercise, and music.
Phosphodiesterase 5 is widely expressed in several tissues in the body for example brain, lung, kidney, urinary bladder, smooth muscle and platelets. [1] It is possible to prevent cGMP hydrolysis by inhibiting PDE5 and therefore treat diseases associated with low cGMP levels, because of this, PDE5 is an ideal target for the development of ...
Treatment can include proton-pump inhibitors and H 2 receptor antagonists used for digestive symptoms such as acid reflux. [41] To treat genitourinary autonomic neuropathy, medications may include sildenafil (a guanine monophosphate type-5 phosphodiesterase inhibitor).
5α-Reductase inhibitors (5-ARIs), also known as dihydrotestosterone (DHT) blockers, are a class of medications with antiandrogenic effects which are used primarily in the treatment of enlarged prostate and scalp hair loss. They are also sometimes used to treat excess hair growth in women and as a component of hormone therapy for transgender ...
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