Tachyphylaxis can best be described as:
A) an unexpected increase in heart rate as a side effect of a drug.
B) an allergic reaction that occurs when a drug is administered for the first time.
C) anaphylactoid episodes occurring due to cross-sensitivity.
D) rapidly decreasing effects with repeated administration of a drug.

Question

Quizplus · Accepted Answer

Tachyphylaxis refers to a rapidly decreasing effect with repeated administration of a drug, meaning that the drug becomes less effective over time with continued use. It is not related to an increase in heart rate, allergic reactions, or cross-sensitivity.

Tachyphylaxis Can Best Be Described As