penile blood flow: nootropics and compounds | sci-wiki

Acetildenafil

Acetildenafil, also known as hongdenafil, is a designer analogue of sildenafil (Viagra) and one of the prototype sildenafil-like PDE5 inhibitors that surfaced in all-natural male-enhancement supplements. Built to mimic sildenafil's blood-flow-boosting mechanism, it delivers erectile-support effects without the branding of a prescription drug, which made it one of the earliest and most widely copied research analogues in the space. It is sought out in gray-market circles precisely for reproducing a pharmaceutical effect in an unregulated form.

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Cardiovascular

Alprostadil

Alprostadil is a manufactured form of prostaglandin E1 (PGE1), a naturally occurring signaling lipid, used as a vasodilator and smooth muscle relaxant. Its best-known applications are the treatment of erectile dysfunction, where it is delivered directly into the penis, and the emergency care of certain newborns with congenital heart defects, in whom it keeps a fetal blood vessel open until surgery. It is also used in some countries for severe peripheral arterial disease [1][2].

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PDE5

Avanafil

Avanafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction, sold under the brand names Stendra and Spedra. It is notable for its fast onset, being absorbed within roughly thirty to forty-five minutes, and for its high selectivity for the PDE5 enzyme. Invented at Mitsubishi Tanabe Pharma and approved by the US Food and Drug Administration in 2012, it works by boosting the nitric-oxide signaling that relaxes blood vessels in the penis.

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Blend

Avanafil + Dapoxetine

Avanafil + Dapoxetine is a fixed-dose combination that pairs avanafil, a fast-acting PDE5 inhibitor for erectile dysfunction, with dapoxetine, a short-acting selective serotonin reuptake inhibitor used to delay ejaculation. It is marketed in some countries as an on-demand treatment for men who have both erectile dysfunction and premature ejaculation. Each ingredient is well studied on its own, but the combination product itself has little dedicated clinical trial data.

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Blend

Sildenafil + Dapoxetine

Sildenafil plus dapoxetine is a pairing of two oral drugs used together in men who have both erectile dysfunction and premature ejaculation. Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor that improves erectile function, while dapoxetine is a short-acting selective serotonin reuptake inhibitor (SSRI) developed specifically to delay ejaculation. The pairing targets the two most common male sexual complaints at once, and fixed-dose tablets combining them are marketed in some countries.

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Blend

Sildenafil + Tadalafil

Sildenafil plus tadalafil is the combined use of two phosphodiesterase type 5 (PDE5) inhibitors for erectile dysfunction, typically a longer-acting daily tadalafil together with on-demand sildenafil. The strategy is generally reserved for men who respond poorly to a single PDE5 inhibitor. Because both drugs share the same basic mechanism, combining them mainly extends coverage rather than adding a new mode of action.

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Blend

Tadalafil + Dapoxetine

Tadalafil plus dapoxetine is a fixed-dose combination that pairs two medicines with complementary effects on male sexual function. Tadalafil is a long-acting PDE5 inhibitor that improves erections, while dapoxetine is a short-acting selective serotonin reuptake inhibitor used to delay ejaculation. Marketed under names such as Tadapox, the combination is aimed at men who have both erectile dysfunction and premature ejaculation and is taken on demand before sexual activity.

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Cardiovascular

Udenafil

Udenafil is a phosphodiesterase type 5 (PDE5) inhibitor, a class of drug used mainly to treat erectile dysfunction. Marketed under the brand name Zydena, it was developed by the South Korean company Dong-A Pharmaceutical and is approved in Korea and several other countries, though not in the United States. It is distinguished by a relatively quick onset together with a long duration of action, which allows both on-demand and once-daily use [1].

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PDE5

Vardenafil

Vardenafil is a prescription medication of the phosphodiesterase type 5 (PDE5) inhibitor class, used to treat erectile dysfunction. Marketed under brand names such as Levitra and the orally disintegrating Staxyn, it improves the ability to achieve and maintain an erection by enhancing the body's natural response to sexual stimulation. It belongs to the same drug family as sildenafil and tadalafil and is taken on demand before sexual activity.

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Blend

Vardenafil + Dapoxetine

Vardenafil plus dapoxetine is a combination of two drugs used together to treat men who have both erectile dysfunction and premature ejaculation. Vardenafil is a phosphodiesterase type 5 (PDE5) inhibitor that improves erections, while dapoxetine is a short-acting selective serotonin reuptake inhibitor (SSRI) that delays ejaculation. The pairing is taken on demand before sexual activity and is marketed as a fixed-dose combination in some countries.

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