Plasma protein binding of salicylate and quinidine in patients with multiple myeloma.

The plasma protein binding of salicylate, a representative acidic drug, and of quinidine, a representative basic drug, has been studied in patients with multiple myeloma, a disease characterized by a profound alteration of the plasma protein pattern. Abnormal binding of salicylate was detected only in patients with high values of circulating abnormal protein. Plasma protein binding of quinidine was not altered in any of the patients studied.