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  2. PDE5 inhibitor - Wikipedia

    en.wikipedia.org/wiki/PDE5_inhibitor

    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.

  3. Phosphodiesterase inhibitor - Wikipedia

    en.wikipedia.org/wiki/Phosphodiesterase_inhibitor

    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).

  4. Discovery and development of phosphodiesterase 5 inhibitors

    en.wikipedia.org/wiki/Discovery_and_development...

    The PDE5 inhibitors sildenafil, vardenafil and tadalafil are competitive and reversible inhibitors of cGMP hydrolysis by the catalytic side of PDE5. The structures of vardenafil and sildenafil are similar, they both contain similar structured purine ring of cGMP that contributes their features to act as a competitive inhibitor of PDE5.

  5. What Is the Safest ED Medication? - AOL

    www.aol.com/safest-ed-medication-105700669.html

    All four of the oral medications listed above belong to a class of drugs called PDE5 inhibitors, which work by inhibiting the effects of the enzyme phosphodiesterase type 5 (PDE5). PDE5 is found ...

  6. Your ED Pill Guide: Everything You Need to Know Before ... - AOL

    www.aol.com/ed-pill-guide-everything-know...

    These ED drugs belong to a class of medications called PDE5 inhibitors, short for phosphodiesterase type 5 inhibitors. They suppress PDE5 (an enzyme in the smooth muscle cells of your blood ...

  7. cGMP-specific phosphodiesterase type 5 - Wikipedia

    en.wikipedia.org/wiki/CGMP-specific...

    PDE5 is an enzyme that accepts cGMP and breaks it down. Sildenafil, vardenafil and tadalafil are inhibitors of this enzyme, which bind to the catalytic site of PDE5. Both inhibitors bind with high affinity and specificity, and cGMP-binding to the allosteric sites stimulates binding of