Answers to Pharmacology MCQS 1

 

Q1. Answer – 2. Dilatation of pupils. Acetylcholine causes pupillary constraiction by acting on M3 receptors.

Q2. Answer – 1. Scopolamine. It is an anticholinergic like atropine.

Q3. Answer – 4. Ipratropium. Why is it preferred over atropine for bronchial asthma?

Q4. Answer – 2. It crosses the blood brain barrier. Since it does not it is preferred for myasthenia gravis.

Q5. Answer – 1. Doxycycline. It is primarily excreted in faeces.

Q6. Answer – 4. Pseudomonas aeruginosa. Despite being broad spectrum antibiotics none of the tetracyclines are effective in pseudomonas infection.

Q7. Answer – 3. Streptococcal pneumonia. A beta-lactam antibiotic is the drug of choice in this condition.

Q8. Answer – 2. Amikacin. It is resistant to aminoglycoside inactivating enzymes.

Q9. Answer – 3. Streptomycin. Topical use is avoided because of high sensitization potential (allergic reactions).

Q10. Answer – 4. Postantibiotic effect. The other statements are wrong.
Aminoglycosides exhibit concentration dependent killing, are more active in alkaline pH and poorly absorbed orally.

Q11. Answer – 4. Lesser incidence of neutropenia

Q12. Answer – 2. 2-3. INR = International normalized ratio.

Q13. Answer – 1. Fresh blood transfusion. Its a medical emergency.
 Q14. Answer – 2. Total parenteral nutrition
 Q15. Answer – 4. Clopidogrel.

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