A nurse is reviewing a list of current medications for a client who is starting therapy with furosemide. Which of the following medications should the nurse identify as being contraindicated?

Choice A rationale Cetirizine, an antihistamine, is not typically contraindicated with furosemide. Furosemide is a loop diuretic, and there is no significant pharmacokinetic or pharmacodynamic interaction between cetirizine and furosemide that would warrant contraindication, allowing for their co-administration when clinically indicated. Choice B rationale Levothyroxine, a thyroid hormone replacement, does not have a contraindication with furosemide. While furosemide can rarely affect thyroid function at high doses, it's not a direct contraindication for concurrent use, and their mechanisms of action are distinct, allowing for safe co-administration. Choice C rationale Lithium carbonate is contraindicated with furosemide due to the risk of lithium toxicity. Furosemide, a loop diuretic, can reduce renal lithium clearance, leading to increased serum lithium levels. Lithium has a narrow therapeutic index (0.6-1.2 mEq/L), and elevated levels can cause severe neurotoxicity, necessitating careful monitoring or avoidance. Choice D rationale Albuterol, a beta-2 adrenergic agonist used for bronchodilation, is not contraindicated with furosemide. Although albuterol can cause hypokalemia, and furosemide can also lead to potassium loss, the combination is not a strict contraindication and can be managed with potassium monitoring, if clinically necessary.