Which term means opposition between two or more medications?

Which term means opposition between two or more medications?

• A. Antagonism
• B. Indication
• C. Idiosyncrasy
• D. Hypersensitivity

Answer: (A)

The concept being tested is a drug–drug interaction where two medications oppose or block each other’s effects. This is called antagonism. Antagonism can happen at the receptor level, when one drug blocks the receptor that another drug would activate, or through pharmacokinetic means, such as one drug increasing the metabolism or clearance of another so its effect is diminished. This term fits best because it directly describes opposition between two medicines, rather than a drug’s clinical use (indication), an unusual individual reaction (idiosyncrasy), or an immune-mediated adverse reaction (hypersensitivity).

The concept being tested is a drug–drug interaction where two medications oppose or block each other’s effects. This is called antagonism. Antagonism can happen at the receptor level, when one drug blocks the receptor that another drug would activate, or through pharmacokinetic means, such as one drug increasing the metabolism or clearance of another so its effect is diminished.

This term fits best because it directly describes opposition between two medicines, rather than a drug’s clinical use (indication), an unusual individual reaction (idiosyncrasy), or an immune-mediated adverse reaction (hypersensitivity).