Although the incidence of tartrazine sensitivity in the general population is low, serious adverse reactions have occurred. To prevent unnecessary exposure of sensitive patients, physicians should avoid prescribing tartrazine-containing drugs. Because of new FDA requirements that manufacturers list tartrazine dye in both over-the-counter and prescription drugs, many manufacturers have reformulated their products to remove this colorant. Therefore, previously published lists of tartrazine-containing drugs are outdated. We conducted a survey of American manufacturers to derive a current list of tartrazine-containing drugs. This list is intended for use as a guide for health professionals who wish to avoid products containing tartrazine in prescribing for patients sensitive to it.