aceclidine acetazolamide acetylcholine acetylcholinesterase inhibitor anatomical therapeutic chemical classification system apraclonidine befunolol beta blocker betaxolol bimatoprost bioavailability biological half-life brimonidine brinzolamide cas registry number carbachol carbonic anhydrase inhibitor carteolol chemspider chemical formula clonidine dapiprazole demecarium bromide dipivefrine dorzolamide drugbank drug metabolism ecothiopate iodide epinephrine excretion glaucoma guanethidine latanoprost levobunolol methazolamide metipranolol neostigmine paraoxon pharmacology physostigmine pilocarpine plasma protein binding prostaglandin analogue pubchem regulation of therapeutic goods route of administration stigmine sulfonamide tafluprost timolol travoprost unoprostone