Question

Idiosyncratic reactions are

• A. drug induced
• B. disease induced
• C. drug-drug interactions
• D. bacterial induced

Hint:

Idiosyncrasy = Individual + Improper (unpredictable) reaction to a Drug.

Answer 1

The Correct Option is A

Step 1: Concept
Idiosyncrasy refers to a genetically determined abnormal reactivity to a chemical.

Step 2: Meaning
These reactions are unpredictable, do not occur in most patients, and are not related to the known pharmacological action of the medicine.

Step 3: Analysis
While these reactions are rare, they are specifically triggered by the administration of a medication to a person with a specific genetic predisposition. They are not caused by the disease state itself or by bacteria.

Step 4: Conclusion
Therefore, idiosyncratic reactions are classified as drug-induced adverse effects.

Final Answer: (A)