In a prospective randomized single-masked study lasting 6 months, 39 eyes with primary open-angle glaucoma showing a long-term drift with 0.5% timolol were put on a "timolol holiday" lasting 30 or 60 days. Twenty-three of them were enrolled with dipivefrin 0.1% twice daily during the holiday. When timolol therapy was restored, the dipivefrin-treated group showed a more pronounced decrease of intraocular pressure (IOP) (8.2 +/- 1.5), whereas the IOP decrease in the nondipivefrin-treated group was lower (3.9 +/- 1.2) and of shorter duration (less than 60 days). Among the dipivefrin-treated group, the response to timolol was more prolonged in the eyes treated for 60 days: the IOP of these eyes was less than 23 mmHg throughout the follow-up
Restoring sensitivity to timolol after long-term drift in primary open-angle glaucoma / S.Gandolfi. - In: INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE. - ISSN 0146-0404. - 31(1990), pp. 354-358.
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