A nurse is reinforcing teaching with a client who has primary open-angle glaucoma and a new prescription for timolol eye drops. Which of the following statements indicates an understanding of the teaching?

Choice A Reason: There is no need to take a zinc supplement with timolol. Choice B Reason: "I should check my heart rate while taking this medication."This statement indicates an understanding of the teaching. Timolol is a beta-blocker eye drop used to lower intraocular pressure in clients with glaucoma. It can be systemically absorbed, and one of its potential side effects is bradycardia (slow heart rate). Therefore, clients taking timolol should be instructed to monitor their heart rate regularly, and if they notice a significant decrease in heart rate, they should notify their healthcare provider. Choice C Reason: Timolol does not typically darken the color of the eyes. Choice D Reason: Timolol does not dilate the eyes; it works to reduce intraocular pressure.