Combined timolol and epinephrine therapy for open angle glaucoma.

A survey of the literature concerning the interaction of timolol and epinephrine in lowering intraocular pressure, and a study comparing the efficacy of timolol and dipivefrin (a prodrug of epinephrine) to that of timolol and pilocarpine are presented. These observations suggest that timolol-epinephrine therapy is less effective than timolol-pilocarpine treatment, although the former combination has clinical value in some patients, and it is possible that this can be enhanced when special schedules for drug administration are used.