Study question and answer on drug reactions.

The patient has an unusual unexpected response to a drug.This is referred to as?.

A.An anaphylactic reaction.

B.Drug tolerance.

C.Idiosyncratic effect.

D.Normal effect.

Correct answer is C.

Rationale: Idiosyncratic effect is an unusual unexpected response to a drug. This is not related to known pharmacological properties .It doesn’t occur in most patients.

Drug tolerance is when the body becomes used to the drug over time.

Anaphylactic reaction can lead to respiratory distress and severe hypotension. It is a severe reaction that occurs immediately after a drug is given to the patient and can be life threatening .