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histamine antagonist
Histamine antagonists are the drugs that bind to but do not activate histamine receptors, thereby blocking the actions of histamine or histamine agonists.
muscarinic antagonist
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.
serotonergic antagonist
Drugs that bind to but do not activate serotonin receptors, thereby blocking the actions of serotonin or serotonergic agonists.
dopaminergic antagonist
A drug that binds to but does not activate dopamine receptors, thereby blocking the actions of dopamine or exogenous agonists.
antiemetic
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.
serotonin uptake inhibitor
A compound that specifically inhibits the reuptake of serotonin in the brain. This increases the serotonin concentration in the synaptic cleft which then activates serotonin receptors to a greater extent.
second generation antipsychotic
Antipsychotic drugs which can have different modes of action but which tend to be less likely than first generation antipsychotics to cause extrapyramidal motor control disabilities such as body rigidity or Parkinson's disease-type movements.
GABA modulator
A substance that does not act as agonist or antagonist but does affect the gamma-aminobutyric acid receptor-ionophore complex. GABA-A receptors appear to have at least three allosteric sites at which modulators act: a site at which benzodiazepines act by increasing the opening frequency of gamma-aminobutyric acid-activated chloride channels; a site at which barbiturates act to prolong the duration of channel opening; and a site at which some steroids may act.
(via benzodiazepine )
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