 - Patients with glaucoma using anti-cholinesterase inhibitors Humorsol demecarium bromide echothiophate iodide, Floropryl isoflurophate, Isopto-Eserine physostigmine salicylate. Anti-cholinesterase inhibitors should not be used while on SP01A, since anticholinesterases inhibit the breakdown of procaine hydrochloride. 