Homatropine (Equipin®, Isopto Homatropine®) is an anticholinergic medication that inhibits muscarinic acetylcholine receptors and thus the parasympathetic nervous system. It is used in eye drops as a cycloplegic, to temporarily paralyze accommodation, and as a mydriatic, to dilate the pupil.

An alkaloid, prepared from atropine, and from other sources. It is chemically related to atropine, and is used for the same purpose.