A review of the literature has identified 10 agents causing contact dermatitis among topically administered drugs for glaucoma. These agents include beta-blockers (timolol, befunolol, betaxolol, levobunolol, carteolol, metipranolol), a carbonic anhydrase inhibitor (dorzolamide), a parasympathomimetic (pilocarpine), and sympathomimetics (dipivefrin, apraclonidine). Patch testing has been documented in certain individuals as well as cross sensitization and reactivity. Systemic reactions to these topically applied medications have been briefly noted.
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Mack R. Holdiness (2001) studied this question.
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