Narrow therapeutic index – Pharmacology MCQ

Which of the following drugs have a narrow therapeutic index?

A. Lithium

B. Diazepam

C. Penicillin

D. Desipramine

Correct answer : A. Lithium

Other drugs with narrow therapeutic index:

Digoxin
Gentamicin
Amphotericin B
Levothyroxine
Prazosin
Theophylline
Quinidine
Warfarin
Valproic acid

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