Select a fat-soluble vitamin:

Correct Answer: B

Rationale: The correct answer is B: Tocopherol. Tocopherol is a fat-soluble vitamin, specifically referring to Vitamin E. Fat-soluble vitamins dissolve in fat and are stored in the body's fatty tissues, allowing for longer-term storage compared to water-soluble vitamins. Ascorbic acid (A) is Vitamin C, which is water-soluble. Thiamine (C) and Riboflavin (D) are both water-soluble B vitamins. Therefore, the correct choice is B because it is the only fat-soluble vitamin among the options provided.

Correct Answer: B

Rationale: The correct answer is B: Lovastatin (Mevacor). Lovastatin is a statin medication used to lower cholesterol levels. It can cause muscle damage, particularly when used in combination with drugs like erythromycin, which can increase lovastatin levels in the body, leading to an increased risk of muscle-related side effects. Cholestyramine (A) is a bile acid sequestrant used to lower cholesterol, but it does not cause muscle damage. Gemfibrozil (C) and Probucol (D) are also cholesterol-lowering drugs, but they are not known to cause significant muscle damage, especially when combined with erythromycin.

Correct Answer: B

Rationale: The correct answer is B: Paget's disease. Etidronate is a bisphosphonate used to treat Paget's disease, a condition characterized by abnormal bone remodeling leading to bone deformities and pain. It helps inhibit bone resorption and reduce the risk of fractures. A: Malabsorption of vitamin D is not an indication for etidronate, as it does not address the underlying cause of the malabsorption. C: Vitamin D deficiency is not directly treated with etidronate. Supplementation or dietary changes are more appropriate. D: Hypercalciuria is not an indication for etidronate. Etidronate is not used to manage excessive calcium excretion.

Correct Answer: B

Rationale: The correct answer is B, Furosemide (Lasix). Furosemide is a loop diuretic that can cause ototoxicity by affecting the inner ear. It can lead to hearing loss or tinnitus. Acetazolamide (A) is a carbonic anhydrase inhibitor, not associated with ototoxicity. Hydrochlorothiazide (C) and Amiloride (D) are not known to cause ototoxicity.

Correct Answer: D

Rationale: The correct answer is D. Tetracyclins can lead to gastrointestinal irritation, phototoxicity, hepatotoxicity, anti-anabolic effect, dental hypoplasia, and bone deformities. Gastrointestinal irritation is a common side effect due to direct irritation of the mucosa. Phototoxicity can occur upon exposure to sunlight. Hepatotoxicity refers to liver damage. Anti-anabolic effect can interfere with bone growth. Dental hypoplasia and bone deformities are associated with tetracycline use during tooth development. Choices A, B, and C only mention some of the side effects, while D encompasses all possible unwanted effects of tetracyclins.