Which effect of protein binding on drugs in the bloodstream is accurate?.

Choice A rationale: Protein binding does not inactivate the drug. Instead, it can affect the drug’s distribution and bioavailability. Choice B rationale: Protein binding does not directly increase the risk of an allergic reaction. Allergic reactions are typically immune responses to a drug, not a result of protein binding. Choice C rationale: An idiosyncratic reaction is an unusual or unexpected reaction to a drug, which is not related to protein binding. Choice D rationale: Protein binding can lead to the accumulation of the drug. Drugs often cannot cross membranes mainly due to the high molecular mass of the drug-protein complex, resulting in the accumulation of the active compounds.