Repeated USMLE Questions Step 1- Review- 77- Pharmacology

Q- Which one of the following antifungal drugs acts by inhibiting the enzyme, 1, 3-beta-glucan synthase?

A- Amphotericin B

B- Caspofungin

C- Griseofulvin

D- Terbinafine

B- Caspofungin- It belongs to the echinocandins drug group which inhibits fungal cell wall synthesis through inhibition of 1, 3-beta-glucan synthase.



Q- Which one of the following agents prevents the release of neurotransmitter at all the cholinergic terminals?

A- Atropine

B- Botulinum toxin

C- Hemicholinium

D- Reserpine

B- Botulinum toxin- It is the only one on the list that acts by inhibition of the release of neurotransmitter at all the cholinergic terminals.



Q- Which one of the following muscarinic antagonists is mainly used in cases of COPD and asthma?

A- Benztropine

B- Glycopyrrolate

C- Ipratropium

D- Scopolamine

C- Ipratropium- It works mainly on the respiratory organ system in cases of asthma and COPD. Benztropine affects CNS and used in cases of Parkinsonism. Glycopyrrolate is used as a preoperative to reduce airway secretions and in children to reduce saliva and drooling. Scopolamine is used in motion sickness.



More Pharmacology MCQs

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