Pharmacology
Dihydromorphine acts as an agonist at the μ-opioid (mu), δ-opioid (delta) and κ-opioid (kappa) receptors. Agonism of the μ-opioid and δ-opioid receptors is largely responsible for the clinical effects of opioids like dihydromorphine with the μ agonism providing more analgesia than the δ.
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