Tropicamide (Ro 1-7683) is a synthetic muscarinic antagonist with actions similar to atropine and with an anticholinergic property. Upon ocular administration, tropicamide binds to and blocks the muscarinic receptors in the sphincter and ciliary muscle in the eye. This inhibits the responses from cholinergic stimulation, producing dilation of the pupil and paralysis of the ciliary muscle. Tropicamide is a diagnostic agent and is used to produce short-duration mydriasis and cycloplegia.

Oxomemazine is a phenothiazine-based histamine H1-receptor blocker with pronounced antimuscarinic activity. Oxomemazine is a selective antagonist of mycotoxins M1 receptors, showing high (Ki=84 nM, M1 receptors) and low (Ki=1.65 μM, M2 receptors) affinity sites 20 times the difference[1]. Oxomemazine is an antihistamine and anticholinergic agent used in studies related to cough studies[2].

Maprotiline hydrochloride (Psymion) is a bridged-ring tetracyclic antidepressant that is both mechanistically and functionally similar to the tricyclic antidepressants, including side effects associated with its use.

Cisatracurium besylate (51W89) is a nondepolarizing skeletal muscle relaxant for intravenous administration.

Dipivefrin hydrochloride (Dipivefrin HCl) that is available as an ophthalmic solution is a prodrug of adrenaline, which is used to treat glaucoma.