List of common opioids

Receptors

μ1 - euphoria

μ2 - hypoventilation, constipation, dependent

δ - hypoventilation, constipation, dependent

κ - antagonize many of the μ effects and engenders diuresis

σ - dysphoria

Opium alkaloids and semisynthetic derivatives

Opium alkaloids

Semisynthetic derivatives

Synthetic opioids

Molecular structure