buyopanaer40mg online | Buy Opana ER 40 mg tablet is a circular, yellow pill that slowly releases oxymorphone hydrochloride to help manage moderate to severe pain. It is manufactured by Endo Pharmaceuticals Inc. and bears the imprint E 40. This medication is specifically intended for long-lasting pain relief and should not be tampered with by crushing, breaking, or chewing, as doing so could result in a dangerous and potentially deadly overdose of oxymorphone.