Sex Enhancement Drugs Avanafil for Sex Enhancement Erection Dysfunction 330784-47-9
Character: White to Off-White Cyrstalline Solid.
Usage: Used for the treatment of erectile dysfunction. A phosphodiesterase 5 inhibitor.
Description of Avanafil
Avanafil is a PDE5 inhibitor approved for erectile dysfunction by the FDA on April 27, 2012 and by EMA on June 21, 2013. Avanafil is known by the trademark names Stendra and Spedra and was developed by Vivus Inc. In July 2013 Vivus announced partnership with Menarini Group, which will commercialise and promote Spedra in over 40 European countries plus Australia and New Zealand. Avanafil acts by inhibiting a specific phosphodiesterase type 5 enzyme which is found in various body tissues, but primarily in the corpus cavernosum penis, as well as the retina. Other similar drugs are sildenafil, tadalafil and vardenafil. The advantage of avanafil is that it has very fast onset of action compared with other PDE5 inhibitors. It is absorbed quickly, reaching a maximum concentration in about 30-45 minutes. About two-thirds of the participants were able to engage in sexual activity within 15 minutes.
Application of Avanafil
It is a development of the phosphodiesterase type 5 inhibitors, for the treatment of male sexual dysfunction, at present in the America, EU and Japan have completed phase II clinical trials, phase III clinical trials will start. The product is composed of Japanese Tanabe Pharma Company and VIVUS company development. In addition to oral dosage forms, VIVUS company is also developing Avanafil urethral administration, for not responding to oral dosage forms of patients.
Avanafil is a potent, highly selective phosphodiesterase 5 inhibitor, in vitro experiments showed that the selectivity of phosphodiesterase 5 stronger than . The compound dear compliance weak against other phosphodiesterase, and effect of adenosine receptor decreased, suggesting that the cardiovascular effects of avanafil should be weaker than .
Pre-clinical study showed that avanafil and organic nitrate drugs taken in combination to reduce its on blood pressure was significantly weaker than and nitrate drugs with clothes. Moreover, avanafil inhibition of phosphodiesterase 6 is very weak, the relevant visual disturbance suppression may the enzyme phosphodiesterase 5 inhibitor induced and other.
For most individuals, the recommended starting dose of avanafil is 100 mg per day taken about 30 minutes before sexual activity. Depending on the adequacy of the response or side effects, the dose may be increased to 200 mg or decreased to 50 mg a day. Individuals who are taking medications that moderately increase the blood levels of avanafil should not exceed a total dose of 50 mg in 24 hours.
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