Anxiolytic agents should:

Correct Answer: B

Rationale: Step-by-step rationale: 1. Anxiolytic agents are specifically designed to reduce anxiety and induce a calming effect. 2. They work by targeting neurotransmitters in the brain to alleviate feelings of anxiety. 3. Anxiolytics do not have analgesic properties, so they do not relieve pain (Choice A). 4. Anxiolytics are not indicated for improving mood in patients with psychotic symptoms (Choice C). 5. Anxiolytics aim to reduce anxiety without causing drowsiness or promoting sleep (Choice D). In summary, the correct answer is B because anxiolytic agents are intended to reduce anxiety and provide a calming effect, while the other choices are incorrect based on the specific pharmacological actions of anxiolytics.

Correct Answer: A

Rationale: The correct answer is A because theophyllines are bronchodilators that help relax the muscles in the airways, making it easier to breathe. By preventing airway constriction, theophyllines can indeed help prevent night asthmatic attacks. Choice B is incorrect because the statement is true. Choice C is incorrect because not all options are correct - only option A is. Choice D is incorrect because the statement is true.

Correct Answer: B

Rationale: The correct answer is B: Fercoven because it is not a common drug used for oral administration. Ferrous sulfate, ferrous lactate, and ferrous fumarate are commonly used oral iron supplements for treating iron deficiency anemia. Fercoven is not a known drug for oral administration in the context of iron supplementation. Therefore, it is the outlier among the choices provided.

Correct Answer: C

Rationale: The correct answer is C. Type III phosphodiesterase inhibitors increase cAMP levels in cardiac myocytes, leading to positive inotropic and vasodilatory effects, reducing afterload. They are associated with the risk of cardiac arrhythmias due to their effects on cardiac contractility. However, they do not show significant cross-tolerance with beta-receptor agonists, as they act via a different mechanism. Therefore, choice C is incorrect.

Correct Answer: D

Rationale: Step 1: Identify the specific bradycardic drug among the choices. Step 2: Atenolol is a beta-blocker known to decrease heart rate. Step 3: Bradycardia is defined as a heart rate <60 bpm. Step 4: Atenolol is commonly used to treat angina and hypertension. Step 5: Therefore, the correct answer is C: Atenolol, as it specifically decreases heart rate. Summary: A: Dipyridamole - antiplatelet, not known for bradycardic effects. B: Validol - used for angina relief, not a bradycardic agent. C: Atenolol - beta-blocker, specific bradycardic drug. D: Alinidine - antiarrhythmic agent, not primarily used for bradycardia.