A client is ordered Timolol as part of their medication regimen for Glaucoma. The nurse knows that Timolol should be avoided in what client conditions?

A. Diabetes mellitus.: Timolol, a non-selective beta-blocker, can mask symptoms of hypoglycemia such as tachycardia, but it is not absolutely contraindicated in diabetes. Diabetic clients require close monitoring, the medication can still be used with caution. B. Chronic kidney disease.: Timolol is administered topically as eye drops and has minimal systemic absorption, so it does not worsen kidney function. It is generally considered safe for clients with chronic kidney disease when used as prescribed. C. Asthma.: Timolol can cause bronchoconstriction by blocking beta-2 receptors in the lungs, leading to respiratory distress in clients with asthma or COPD. Because of this risk, it is contraindicated in these patients, as even topical administration may trigger bronchospasm. D. Hyperthyroidism.: Timolol may help manage some symptoms of hyperthyroidism, such as tremors or tachycardia, due to its beta-blocking effects. Therefore, it can be beneficial in controlling adrenergic symptoms in these clients.