A man has been searching for an aphrodisiac or some other agent to enhance 'sexual performance' discovers yohimbine. He consumes the drug in excess and develops symptoms of toxicity that require your intervention. Which of the following should you expect as a response to this drug?

Correct Answer: D

Rationale: The correct answer is D: Hypertension. Yohimbine is a known alpha-2 adrenergic antagonist, leading to increased sympathetic activity and consequently, hypertension. This occurs due to increased norepinephrine release and vasoconstriction. Bradycardia (A) is unlikely as yohimbine usually causes tachycardia. Bronchoconstriction (B) is not a common effect of yohimbine. Excessive secretions by exocrine glands (C) are not associated with yohimbine toxicity.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: The correct answer is D: Salbutamol. Salbutamol is a selective β2 adrenoceptor agonist. It has a higher affinity for β2 receptors compared to β1 receptors, leading to bronchodilation without significant effects on the heart. A: Adrenaline and C: Isoprenaline stimulate both β1 and β2 receptors, causing increased heart rate and bronchodilation. B: Noradrenaline stimulates α1, α2, and β1 receptors, leading to vasoconstriction and increased heart rate. Therefore, salbutamol is the only drug that selectively stimulates β2 adrenoceptors, making it the correct choice.

Correct Answer: D

Rationale: The correct answer is D: Diarrhea. Atropine is an anticholinergic drug that typically causes dry mouth, tachycardia, and blurred vision as side effects due to its mechanism of blocking acetylcholine receptors. However, diarrhea is not a common side effect of atropine. It is important to differentiate the expected side effects of a drug from those that are not commonly associated with it based on its pharmacological actions.

Correct Answer: C

Rationale: Adrenaline, also known as epinephrine, is a hormone that activates the fight-or-flight response. It causes bronchial muscle relaxation (A), increases cardiac contractility (B), and increases sweat secretion (D) to prepare the body for action. However, adrenaline inhibits intestinal motility (C) to conserve energy for vital functions during stressful situations. Therefore, the correct answer is C because adrenaline does not increase intestinal motility. Relaxation of bronchial muscle, increased cardiac contractility, and increased sweat secretion are all effects of adrenaline, making choices A, B, and D incorrect, respectively.