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NMDA receptor antagonist
Any substance that inhibits the action of N-methyl-D-aspartate (NMDA) receptors. They tend to induce a state known as dissociative anesthesia, marked by catalepsy, amnesia, and analgesia, while side effects can include hallucinations, nightmares, and confusion. Due to their psychotomimetic effects, many NMDA receptor antagonists are used as recreational drugs.
H1-receptor antagonist
H1-receptor antagonists are the drugs that selectively bind to but do not activate histamine H1 receptors, thereby blocking the actions of endogenous histamine.
parasympatholytic
Any cholinergic antagonist that inhibits the actions of the parasympathetic nervous system. The major group of drugs used therapeutically for this purpose is the muscarinic antagonists.
muscarinic antagonist
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.
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H1-receptor antagonist
H1-receptor antagonists are the drugs that selectively bind to but do not activate histamine H1 receptors, thereby blocking the actions of endogenous histamine.
antiparkinson drug
A drug used in the treatment of Parkinson's disease.
parasympatholytic
Any cholinergic antagonist that inhibits the actions of the parasympathetic nervous system. The major group of drugs used therapeutically for this purpose is the muscarinic antagonists.
muscle relaxant
A drug used to produce muscle relaxation (excepting neuromuscular blocking agents). Its primary clinical and therapeutic use is the treatment of muscle spasm and immobility associated with strains, sprains, and injuries of the back and, to a lesser degree, injuries to the neck. Also used for the treatment of a variety of clinical conditions that have in common only the presence of skeletal muscle hyperactivity, for example, the muscle spasms that can occur in multiple sclerosis.
muscarinic antagonist
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.
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