Which of the following conditions is not treated with Dexamethasone?

Correct Answer: D

Rationale: Explanation: Dexamethasone is a corticosteroid used to treat inflammation and conditions like asthma and Addison's disease, which involve inflammation or immune responses. Wilson's disease is a genetic disorder related to copper metabolism, not treated with Dexamethasone. Dexamethasone could worsen Wilson's disease due to its potential impact on copper levels.

Correct Answer: A

Rationale: Protamine is the antidote for Heparin toxicity because it binds to Heparin and forms a stable complex, neutralizing its anticoagulant effects. Protamine sulfate is positively charged, while Heparin is negatively charged, allowing them to bind effectively. Methylene blue is used to treat methemoglobinemia, not Heparin toxicity. N-acetylcysteine is used for acetaminophen overdose, and Glucagon is used for beta-blocker overdose.

Correct Answer: D

Rationale: The correct answer is D: Penicillamine. Penicillamine is a chelating agent that binds to copper and forms a complex that can be excreted from the body, making it an effective antidote for copper toxicity. Glucagon (A) is used for treating hypoglycemia, aminocaproic acid (B) is used to treat excessive bleeding, and atropine (C) is used to treat bradycardia and organophosphate poisoning, none of which are related to copper toxicity.

Correct Answer: A

Rationale: The correct answer is A: Flumazenil. Flumazenil is a specific benzodiazepine receptor antagonist that can reverse the effects of benzodiazepine toxicity by competitively inhibiting the binding of benzodiazepines to their receptors. It works by reversing the sedative and respiratory depressant effects of benzodiazepines. Methylene blue (B) is used to treat methemoglobinemia, not benzodiazepine toxicity. Deferoxamine (C) is used for iron toxicity. Alkalinizing urine (D) is used to enhance the excretion of weak acids in the urine, not for benzodiazepine toxicity.

Correct Answer: C

Rationale: The correct answer is C: CaEDTA. Calcium disodium ethylenediaminetetraacetic acid (CaEDTA) is a chelating agent used to treat lead poisoning by binding to lead ions in the bloodstream and enhancing their excretion through urine. It forms stable complexes with lead, reducing its toxicity. Naloxone (A) is an opioid receptor antagonist, used to reverse opioid overdose. Nitrite (B) is used in cyanide poisoning. Dialysis (D) is not effective in removing lead from the body as lead is not effectively dialyzable.