Select the antiseizure drug with an analgesic component of effect:

Correct Answer: A

Rationale: The correct answer is A: Carbamazepine. Carbamazepine has a dual mechanism of action, functioning as both an antiseizure medication and an analgesic. It is commonly used to treat neuropathic pain and trigeminal neuralgia. Carbamazepine's analgesic properties stem from its ability to block voltage-gated sodium channels, reducing neuronal excitability and pain transmission. Summary of other choices: B: Ethosuximide - Primarily used for absence seizures, lacks analgesic properties. C: Phenytoin - Effective against various seizure types but does not have significant analgesic effects. D: Clonazepam - A benzodiazepine used as an antiseizure medication, but does not possess analgesic properties.

Correct Answer: C

Rationale: The correct answer is C because cordiamine does not decrease aortic and coronary flow; instead, it actually increases coronary flow. Cordiamine stimulates the CNS, facilitates movement coordination, acts as a respiratory analeptic, and counteracts central depression from other drugs. Choice A is incorrect as cordiamine does stimulate the CNS and facilitates movement coordination. Choice B is incorrect as cordiamine is indeed a respiratory analeptic of mixed action. Choice D is incorrect as cordiamine does counteract central depression from other drugs like barbiturates.

Correct Answer: C

Rationale: The correct answer is C because sharp swings from a cheerful mood to an aggressive state are not typically associated with barbiturate intoxication. Barbiturates generally depress the central nervous system, leading to symptoms such as stupor, confusion, and slowed thinking. Choice A includes symptoms like vertigo and myasthenia, which can be experienced during barbiturate intoxication. Choice B includes symptoms like perceptual distortions, behavior changes, and speech excitation, which are commonly seen in barbiturate intoxication. Choice D mentions sleep with subsequent weakness and headaches, which are also common symptoms of barbiturate intoxication. Overall, the incorrect choices describe symptoms that align with barbiturate intoxication, making C the outlier.

Correct Answer: B

Rationale: The correct answer is B: Aethylmorphine hydrochloride. Antitussives of narcotic type act on the cough center in the brain to suppress cough reflex. Aethylmorphine is an opioid derivative that exerts its antitussive effect centrally. Glaucine hydrochloride (A) is a non-narcotic antitussive derived from plants. Tusuprex (C) is a non-narcotic antitussive that acts peripherally. Libexine (D) is an antihistamine, not an antitussive.

Correct Answer: B

Rationale: The correct answer is B because stimulant purgatives work by increasing motility and secretion in the intestines. This leads to enhanced peristalsis, resulting in the expulsion of fecal matter. Choice A is incorrect as stimulant purgatives do not directly affect the volume of non-absorbable solid residue. Choice C is incorrect as altering fecal consistency is not the primary mechanism of stimulant purgatives. Choice D is incorrect as stimulant purgatives primarily work by increasing motility and secretion, not the water content in the intestines.