Select the non-narcotic drug,which is a paraaminophenol derivative:

Correct Answer: D

Rationale: The correct answer is D: Paracetamol. Paracetamol is a non-narcotic drug that belongs to the paraaminophenol derivative class. It is commonly used for pain relief and fever reduction. Analgin (A) is a narcotic drug and should be avoided due to safety concerns. Aspirin (B) is a nonsteroidal anti-inflammatory drug (NSAID), not a paraaminophenol derivative. Baclofen (C) is a muscle relaxant and not a paraaminophenol derivative. Therefore, the correct choice is D as it is the only non-narcotic drug that fits the given criteria.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Pantocrin is a general tone-increasing drug. 2. Pantocrin is derived from animal sources. 3. It is known to have stimulating effects. 4. As an agent of animal origin, Pantocrin fits the criteria. Summary: B: Amphetamine is a synthetic drug, not of animal origin. C: Sydnocarb is a synthetic drug, not of animal origin. D: Camphor is a natural substance but not a general tone-increasing drug.

Correct Answer: C

Rationale: The correct answer is C: More than 800 mg/d. High doses of benzodiazepines increase the risk of developing physical dependence, leading to severe withdrawal symptoms when discontinued. Dosages exceeding 800 mg/d are considered very high and are more likely to result in severe withdrawal symptoms after prolonged use. Choices A, B, and D all suggest lower dosages which are less likely to cause severe withdrawal symptoms compared to doses exceeding 800 mg/d. Therefore, option C is the correct choice for the dosage of benzodiazepines that may produce severe withdrawal symptoms after 60-90 days of use.

Correct Answer: C

Rationale: The correct answer is C: Halothane. Halothane can produce hepatic necrosis due to its metabolite, trifluoroacetic acid. This metabolite can lead to liver damage in susceptible individuals. Other choices, A (Sevoflurane), B (Desflurane), and D (Nitrous oxide) do not typically cause hepatic necrosis. Sevoflurane and Desflurane are not metabolized to toxic compounds that affect the liver, and Nitrous oxide is not known to cause hepatic necrosis. Therefore, the correct answer is C because of the specific hepatotoxic effects associated with Halothane.

Correct Answer: A

Rationale: The correct answer is A: Sodium bicarbonate. Sodium bicarbonate causes metabolic alkalosis by increasing bicarbonate levels in the body, leading to an excess of base. This can occur in conditions like overdose or prolonged use. B: Cimetidine is an H2 receptor antagonist that can cause metabolic acidosis, not alkalosis. C: Pepto-Bismol contains bismuth subsalicylate and can cause metabolic acidosis. D: Carbenoxolone is a drug that can cause metabolic alkalosis.