A nurse is teaching a client about a medication that has a receptor with an antagonist effect.
Which information should the nurse include in the teaching?

Choice A rationale

Cetirizine is an antihistamine used to relieve allergy symptoms such as runny nose, itching, and sneezing. It works by blocking histamine, a substance in the body that causes allergic reactions.

Choice B rationale

Diphenhydramine is also an antihistamine used to treat symptoms of allergy, hay fever, and the common cold. It works by blocking the effects of histamine in the body.

Choice C rationale

Beclomethasone is a corticosteroid used to prevent and control symptoms such as wheezing and shortness of breath caused by asthma. It is not classified as an antihistamine.

Choice D rationale

Phenylephrine is a decongestant used to relieve nasal discomfort caused by colds, allergies, and hay fever. It is not classified as an antihistamine.

Choice A rationale

Spironolactone is a potassium-sparing diuretic that acts on the collecting ducts and late distal tubules but not on the loop of Henle.

Choice B rationale

Hydrochlorothiazide is a thiazide diuretic that works on the distal convoluted tubule, not the loop of Henle.

Choice C rationale

Furosemide is a loop diuretic that acts on the ascending limb of the loop of Henle to inhibit sodium and chloride reabsorption, leading to increased urine output.

Choice D rationale

Mannitol is an osmotic diuretic that primarily acts on the proximal tubule and the descending limb of the loop of Henle.