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    GlossaryPDE5 inhibitors (PDE5i)

    block enzyme to improve blood flow in certain conditions

    PDE5 inhibitors, or phosphodiesterase type 5 inhibitors, are a class of medications that block the enzyme PDE5, which is involved in regulating blood flow in the body. By inhibiting this enzyme, these drugs help to relax blood vessels and improve blood flow, making them effective treatments for conditions like erectile dysfunction and pulmonary arterial hypertension.

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