What type of drug is Oxandrolone that was found in the system of  Cinthya Domínguez in 2015?
Cinthya Domínguez Cinthya Domínguez (born 1982-10-29) is a female weightlifter from Mexico. She won the silver medal at the 2007 Pan American Games for her native North American country in the – 69 kg weight division. In 2015 Domínguez was suspended after she failed a drug test (found trace of Oxandrolone).
Nalfurafine Nalfurafine (INN, USAN) (brand name Remitch; former developmental code names TRK-820, AC-820, MT-9938) is an antipruritic (anti-itch drug) that is marketed in Japan for the treatment of uremic pruritus in individuals with chronic kidney disease undergoing hemodialysis. It acts as a potent, selective, centrally-penetrant κ-opioid receptor (KOR) agonist, and is the first and currently the only selective KOR agonist to have been approved for clinical use. It has also been dubiously referred to as the "first non-narcotic opioid drug" in history.