ChEBI

A molecular entity capable of accepting a hydron from a donor (Bronsted acid).

Any intermediate or product resulting from metabolism. The term 'metabolite' subsumes the classes commonly known as primary and secondary metabolites.

A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.

Any substance that possesses little anaesthetic effect by itself, but which enhances or potentiates the anaesthetic action of other drugs when given at the same time.

A drug that suppresses spasms. These are usually caused by smooth muscle contraction, especially in tubular organs. The effect is to prevent spasms of the stomach, intestine or urinary bladder.

Agent that dilates the pupil. Used in eye diseases and to facilitate eye examination. It may be either a sympathomimetic or parasympatholytic. The latter cause cycloplegia or paralysis of accommodation at high doses and may precipitate glaucoma.

Any pharmacological or immunological agent that modifies the effect of other agents such as drugs or vaccines while having few if any direct effects when given by itself.

Antidepressants are mood-stimulating drugs used primarily in the treatment of affective disorders and related conditions.

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.