Which drugs will not be affected by interpatient variability? (Select all that apply.)
a. Antiseptics applied to the skin to slow bacterial growth
b. Antacids to help with the discomfort of heartburn
c. Broad-spectrum antibiotics that are effective against many organisms
d. Chelating agents that remove metal compounds from the body
e. Topical analgesics used to treat localized pain
ANS: A, B, D
Antiseptics, antacids, and chelating agents are all receptorless drugs that do not depend on the body's processes for effects; these agents react with other molecules. Broad-spectrum antibiotics and topical analgesics bind with receptors to produce desired effects, and these processes can be influenced by individual patient variables.
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