*Binder A, et al. Clin Drug Invest. 2009;29(6):393–408 (sponsored by Grünenthal GmbH). Rowbotham MC et al. Pain 1996;65:39–44 (sponsored by Harry Hind and NIH Pain Research Training Program Grant NS07265.). #Katz NP, et al. Pain Med. 2002;3(4):324–332 (sponsored by Endo Pharmaceuticals Inc.)
^May take 2-4 weeks for the full pain relief effect.