Il gingseng ti da effetto placebo.
Che infatti a me piacerebbe fare uno studio tra chi assume Viagra e company provando a dare a sua insaputa una pillola identica ma senza principio attivo.
Secondo me il 50% degli utenti che qui lo usano avrebbero comunque l'effetto.
Non il 50% ma circa la metà ;-)
Safety of sildenafil citrate: review of 67 double‐blind placebo‐controlled trials and the postmarketing safety database - Giuliano - 2010 - International Journal of Clinical Practice - Wiley Online Library
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Sci-Hub | Safety of sildenafil citrate: review of 67 double-blind placebo-controlled trials and the postmarketing safety database. International Journal of Clinical Practice, 64(2), 240–255 | 10.1111/j.1742-1241.2009.02254.x
Sildenafil citrate (Viagra®) in the treatment of men with erectile dysfunction in southern Latin America: a double-blind, randomized, placebo-controlled, parallel-group, multicenter, flexible-dose escalation study | International Journal of Impotence Research
Our objectives were: (1) to determine the efficacy, safety, and tolerability of sildenafil citrate (Viagra®) administered to men with broad-spectrum erectile dysfunction (ED) in southern Latin America; and (2) to correlate Rigiscan® measurements assessing ED etiology with the investigator's...
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Sci-Hub | Sildenafil citrate (Viagra®) in the treatment of men with erectile dysfunction in southern Latin America: a double-blind, randomized, placebo-controlled, parallel-group, multicenter, flexible-dose escalation study. International Journal of Impotence Research, 14(s2), S33–S41 | 10.1038/sj.ijir.3900896
Sexual function and satisfaction in heterosexual couples when men are administered sildenafil citrate (Viagra®) for erectile dysfunction: a multicentre, randomised, double‐blind, placebo‐controlled trial - Heiman - 2007 - BJOG: An International Journal of Obstetrics & Gynaecology - Wiley Online Library
obgyn.onlinelibrary.wiley.com
Sci-Hub | Sexual function and satisfaction in heterosexual couples when men are administered sildenafil citrate (Viagra®) for erectile dysfunction: a multicentre, randomised, double-blind, placebo-controlled trial. BJOG: An International Journal of Obstetrics & Gynaecology, 114(4), 437–447 | 10.1111/j.1471-0528.2006.01228.x
Randomized, Double-Blind, Placebo-Controlled Trial of Sildenafil (Viagra®) for Erectile Dysfunction After Rectal Excision for Cancer and Inflammatory Bowel Disease | SpringerLink
PURPOSE: Controlled trials have demonstrated the efficacy of sildenafil for “mixed etiology” erectile dysfunction, but this may not be the case if there is underlying pelvic parasympathetic nerve damage. We aimed to determine the efficacy of sildenafil after rectal excision for rectal cancer and...
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Sci-Hub | Randomized, Double-Blind, Placebo-Controlled Trial of Sildenafil (Viagra®) for Erectile Dysfunction After Rectal Excision for Cancer and Inflammatory Bowel Disease. Diseases of the Colon & Rectum, 45(6), 727–732 | 10.1007/s10350-004-6287-9