If drug a is found to bind to a certain type of receptor more strongly than drug b, then drug a is said to have greater:

Affinity for receptor

Explanation:

The affinity for drug A is higher than drug b .

Affinity is defined as the ability of any drug to tightly bind to a receptor.

The higher the affinity of a drug, the higher are its chances of binding with receptor. Affinity depends on intrinsic activity which is a measure of ability of drug to generate activating stimulus while binding to the receptor.

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