 5. 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 procaine hydrochloride, since procaine itself has some anti-cholinesterase activity. 