adrenergic antagonist NMDA receptor antagonist opioid analgesic tramadol hydrochloride 2025-02-11T14:44:47Z CAS:36282-47-0 PMID:33486778 This is any condition in which the main influencing factor is tramadol hydrochloride, a racemate consisting of equal amounts of (R,R)- and (S,S)-tramadol hydrochloride. Tramadol hydrochloride is a centrally acting synthetic opioid analgesic, used to treat moderately severe pain. Tramadol hydrochloride has a role as a delta-opioid receptor agonist, a kappa-opioid receptor agonist, a mu-opioid receptor agonist, an adrenergic uptake inhibitor, an antitussive, a capsaicin receptor antagonist, a muscarinic antagonist, a nicotinic antagonist, a NMDA receptor antagonist, a serotonergic antagonist and a serotonin uptake inhibitor. XCO:0001546 experimental_condition_ontology rac-(1R,2R)-2-[(dimethylamino)methyl]-1-(3-methoxyphenyl)cyclohexanol hydrochloride racemic tramadol hydrochloride slaulederkind tramadol HCl