Analgesics, Opioid

**Definition:** Compounds with activity like OPIATE ALKALOIDS, acting at OPIOID RECEPTORS. Properties include induction of ANALGESIA or NARCOSIS.

**Tree numbers:** - D27.505.696.277.600.500 - D27.505.696.663.850.014.760.500 - D27.505.954.427.040.550.500 - D27.505.954.427.210.600.500

**Synonyms:** - Opioid Analgesic - Opioid Analgesics