Ethylmorphine (also known as codethyline, dionine, and ethyl morphine) is an opioid analgesic and antitussive.

[2][3][4][5][6][7] Adverse effects are similar to other opioids and include drowsiness, constipation, vertigo, nausea, vomiting, and respiratory depression.

Ethylmorphine may affect the user's ability to drive and operate heavy machinery, and may cause chemical dependence or addiction at high doses.

[8] Ethylmorphine was first marketed in France in 1953 by Houde, and in Norway and Spain in 1960.

It is not available in the United States, where it is a Schedule II controlled substance.