<prompt> Acquired nasolacrimal duct obstruction is a side effect of therapy of which of the following medicationTimololBrimonidineDorzolamidePilocarpine  <response>: Ans. a. Timolol Acquired nasolacrimal duct obstruction is a side effect of chronic use of timolol-containing topical glaucoma therapy. Chronic use of timolol-containing topical glaucoma therapy preparations in glaucoma patients is associated with an increased risk for the development of nasolacrimal duct obstruction NLD0.- Seider N, Miller B. Beiran I. Topical glaucoma therapy as a risk factor for nasolacrimal duct obstruction. 