Antimuscarinic Drugs MCQs With Answers
1. Jamestown weed (Datura stromonium) is a plant that contains what alkaloid (naturally occurring)?
a. Pilocarpine.
b. Nicotine.
c. Muscarine.
d. Atropine.
2. Which will reverse antimuscarinic blockage of muscarinic receptor sites?
a. Cholinergic drugs.
b. Adrenergic agonists.
c. Adrenergic antagonists.
d. Anticholinesterase drugs.
3. Which antimuscarinic drug is the most nonselective muscarinic receptor antagonist?
a. Atropine.
b. Pirenzepine.
c. Darifenacin.
d. Solifenacin.
4. Which statement about antimuscarinic drugs is true?
a. Antimuscarinic drugs are similar in their onset and duration of action.
b. All antimuscarinic drugs pass readily into the central nervous system.
c. Atropine and scopolamine have identical antimuscarinic effects on organs.
d. Muscarinic receptor subtypes vary in their attraction for specific antimuscarinic drugs.
5. Which effects of atropine result in urinary retention?
a. Relaxation of the ureters and detrusor muscle of the bladder with relaxation of the sphincter.
b. Relaxation of the ureters and detrusor muscle of the bladder with contraction of the sphincter.
c. Contraction of the bladder detrusor muscle and ureters with relaxation of the sphincter.
d. Contraction of the bladder detrusor muscle and ureters with contraction of the sphincter.
6. Which is the most life-threatening effect of antimuscarinic drug overdose?
a. Increase in heart rate.
b. Body temperature increase.
c. Direct central nervous system stimulation.
d. Suppression of secretory glands in the respiratory tract.
7. Which antimuscarinic drug produces the shortest duration of mydriasis?
a. Atropine.
b. Scopolamine.
c. Tropicamide.
d. Homatropine.
8. Topical administration of antimuscarinic drugs is contraindicated in patients with which condition?
a. Motion sickness.
b. Parkinson’s disease.
c. Narrow-angle glaucoma.
d. Adhesions between the lens and iris.
9. The adult intravenous dose of atropine for antisialagogue effects in oral surgery is
a. 0.1 mg to 0.3 mg.
b. 0.4 mg to 0.6 mg.
c. 0.7 mg to 0.9 mg.
d. 1.0 mg to 1.2 mg.
