Correct Answer: B

Rationale: Spinach is high in vitamin K, which antagonizes the effects of warfarin sodium, an anticoagulant medication. Therefore, clients taking warfarin should avoid consuming foods rich in vitamin K, like spinach, to maintain the medication's effectiveness.

Correct Answer: B

Rationale: Lansoprazole is a gastric acid pump inhibitor commonly used to treat gastroesophageal reflux disease (GERD) by reducing stomach acid. Heartburn is a key symptom of GERD, so asking about heartburn can help assess the effectiveness of lansoprazole in managing acid reflux symptoms.

Correct Answer: C

Rationale: The correct answer is C. Hydrochlorothiazide is a thiazide diuretic, which can lead to hypokalemia, hyperglycemia, hypercalcemia, hyperlipidemia, and hyperuricemia. It is a sulfa-based medication, so individuals with a sulfa allergy are at risk for an allergic reaction when taking hydrochlorothiazide.

Correct Answer: D

Rationale: Constipation is a common side effect of iron supplements such as ferrous sulfate. Iron can cause constipation by slowing down the movement of the digestive system and hardening the stool. Patients should be advised to increase their fluid intake, dietary fiber, and physical activity to help alleviate this side effect.

Correct Answer: B

Rationale: Colchicine is contraindicated in clients with severe gastrointestinal, renal, hepatic, or cardiac disorders, or blood dyscrasias. Renal failure is a condition where the kidneys fail to function adequately, leading to the accumulation of toxins in the body. Since colchicine is contraindicated in clients with renal disorders, including renal failure, it could exacerbate the condition and worsen the client's health.