EthylmorphineEthylmorphine is an opioid analgesic and antitussive.Side effectsAdverse effects are similar to other opioids and include drowsiness, constipation, vertigo, nausea, vomiting, and respiratory depression. Contraindications include asthma, respiratory insufficiency, and age under 8. Ethylmorphine may affect the user's ability to drive and operate heavy machinery, and may cause chemical dependence or addiction at high doses.Society and cultureEthylmorphine was first marketed in France in 1953 by Houde, and in Norway and Spain in 1960. It is not marketed in the United States and is a Schedule II controlled substance.