Quercetin, an antioxidant and anti-inflammatory, has been associated with a decrease in male pelvic pain in a double-blind, placebo-controlled trial (Shoskes et al 1999). Subjects given Prosta-Q (quercetin + bromelain and papain for intestinal absorption) reported up to 82% improvement in pain – better than quercetin alone (Herati et al 2013).
Herati A, Moldwin R. Alternative therapies in the management of chronic prostatitis/chronic pelvic pain syndrome. World J Urol. (2013) 31:761-6.
Shokes D, Zeitlin S, Shahed A, Rajfer J. Quercetin in men with category III chronic prostatitis: a preliminary prospective, double-blind, placebo-controlled trial. Urology. 1999 Dec:54(6):960-3.