Potential systemic and ocular side effects associated with topical administration of timolol maleate

A review of current literary sources disclosed a host of adverse reactions which may potentially be associated with the topical administration of timolol maleate. Systemic complications included a variety of cardiovascular, respiratory, central nervous system, gastrointestinal, and dermatologic reactions. Numerous ocular side effects were also reported including superficial punctate keratitis, ocular pain or discomfort, corneal anesthesia, and vague visual disturbances.