The album title came from an audience member who suggested "Flight of the Codeine Hippo" as a name for the title track.
Codeine is an example of a prodrug, which is metabolized in the body to the opiate known as morphine.
In a study reported in Forensic Science International, A.J. Jenkins, at the Office of the Cuyahoga County Coroner (Cleveland, OH), the author reports the analysis of ten randomly collected one-dollar bills from five cities, and tested for cocaine, heroin, 6-acetylmorphine (also called "6-AM"), morphine, codeine, methamphetamine, amphetamine and phencyclidine (PCP).
In Commonwealth countries, such as Australia, Canada, South Africa and the United Kingdom, doxylamine is available prepared with paracetamol (acetaminophen) and codeine under the brand name Dolased, Propain Plus, Syndol, or Mersyndol, as treatment for tension headache and other types of pain.
Miller has said that he became addicted to combination of promethazine and codeine known as "purple drank" or "lean." which he began taking to manage the stress he was enduring during his Macadelic Tour in 2012.
Solpadeine is the brand name of pain-relief medication containing paracetamol, caffeine and codeine currently made by Omega Pharma.
Thebaine (paramorphine), also known as codeine methyl enol ether, is an opiate alkaloid, its name coming from the Greek Θῆβαι, Thēbai, an ancient city in Upper Egypt.