Precursor to metabolite: Heroin to Morphine

Heroin is converted to Morphine by esterase.

Heroin mascot — mnemonic cartoon — Visual mnemonic: Heroin mascot

Morphine mascot — mnemonic cartoon — Visual mnemonic: Morphine mascot

The pair

Heroin — Diacetylmorphine; a rapidly-acting prodrug of morphine, no US medical use.
Morphine — Prototypical opioid analgesic and comparison standard.

Heroin · Morphine · Open Heroin in the interactive console ↗