What is true of risperidone?

Correct Answer: D

Rationale: Risperidone is an atypical antipsychotic that blocks both dopamine and serotonin receptors with minimal extrapyramidal effects.

Correct Answer: D

Rationale: Meperidine is a commonly used opioid analgesic that is often used in detoxification programs due to its ability to help manage withdrawal symptoms. In this case, the patient was undergoing a detoxification program supervised by surgery, and a drug was administered intravenously. Meperidine is a likely choice as it can help alleviate withdrawal symptoms and manage pain during the detoxification process.

Correct Answer: D

Rationale: Pyruvate dehydrogenase is impaired due to thiamine deficiency in Wernicke-Korsakoff syndrome.

Correct Answer: B

Rationale: Corticosteroids can cause sodium retention, leading to hypertension due to their mineralocorticoid effects.

Correct Answer: B

Rationale: Triamterene is a potassium-sparing diuretic that inhibits Na+ channels in the distal tubule reducing K+ loss.