Atropine has the following side effects EXCEPT:

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: Rationale: - Noradrenaline stimulates both α and β receptors, leading to increased heart rate and vasoconstriction. - It does not decrease heart rate; it actually increases heart rate due to its actions on β receptors. - Noradrenaline causes vasoconstriction by activating α receptors, leading to increased blood pressure. - The incorrect statement is C, as noradrenaline actually increases blood pressure by causing vasoconstriction.

Correct Answer: D

Rationale: Step 1: Atropine is an anticholinergic drug that blocks muscarinic receptors. Step 2: Blocking muscarinic receptors in the eye leads to dilation of the pupil, known as mydriasis. Step 3: Therefore, the correct answer is D, as atropine indeed produces mydriasis. Summary: A is incorrect because atropine is not a neuromuscular blocker. B is incorrect as atropine actually induces tachycardia. C is incorrect as atropine inhibits GIT motility and secretion.

Correct Answer: B

Rationale: The correct answer is B: Terbutaline. Terbutaline is a beta-2 adrenergic agonist used as a bronchodilator. It can stimulate beta-2 receptors in skeletal muscle, leading to muscle tremors as a common side effect. Ipratropium (A) is an anticholinergic bronchodilator and typically does not cause muscle tremors. Atenolol (C) is a beta-blocker and is not associated with muscle tremors. Nicotinic acid (D) is used to treat dyslipidemia and does not commonly cause muscle tremors. Therefore, Terbutaline is the most likely drug to cause muscle tremor among the options provided.

Correct Answer: C

Rationale: The correct answer is C: β-adrenergic agonist. Ritodrine is indicated for suppressing uterine contractions, which is a typical effect of β-adrenergic agonists. Bronchodilation is also a known effect of β-adrenergic agonists. Since the drug has no vasoconstrictor effects and does not affect the size of the pupil of the eye, it is unlikely to be an α-adrenergic agonist or an antimuscarinic drug. Additionally, the fact that ritodrine causes bronchodilation further supports its classification as a β-adrenergic agonist.