H1-receptor antagonists are the drugs that selectively bind to but do not activate histamine H1 receptors, thereby blocking the actions of endogenous histamine.
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.
H1-receptor antagonists are the drugs that selectively bind to but do not activate histamine H1 receptors, thereby blocking the actions of endogenous histamine.
A drug used to prevent nausea or vomiting. An antiemetic may act by a wide range of mechanisms: it might affect the medullary control centres (the vomiting centre and the chemoreceptive trigger zone) or affect the peripheral receptors.
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.