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?

Timolol is a beta-blocker medication that is commonly prescribed for the treatment of glaucoma. It works by reducing the production of aqueous humor in the eye, thereby decreasing intraocular pressure. However, timolol can also be systemically absorbed, which may lead to cardiovascular side effects. Checking the heart rate while taking timolol is important because beta-blockers can potentially lower heart rate and blood pressure. It is essential to monitor for any changes in heart rate or any other cardiovascular symptoms while using timolol eye drops.