Inconsistent labeling of food effect for oral agents across therapeutic areas: differences between oncology and non-oncology products.
OBJECTIVE
Several recent oral oncology drugs were labeled for administration in fasted states despite the fact that food increases their bioavailability. Because this was inconsistent with the principles of oral drug delivery, we hypothesized that there were inconsistencies across therapeutic areas.


METHODS
Oral agents approved by the U.S. Food and Drug Administration from January 2000 to May 2009 were included in our study. Comparison of the food labeling patterns between oncology and non-oncology drugs was made using Fisher's exact test.


RESULTS
Of the 99 drugs evaluated, 34 showed significant food effects on bioavailability. When food markedly enhanced bioavailability, eight out of nine non-oncology drugs were labeled "fed" to take advantage of the food-drug interaction, whereas all oncology drugs (n = 3) were labeled to be administered in "fasted" states (Fisher's exact test, P = 0.01).


CONCLUSIONS
Drug labeling patterns with respect to food-drug interactions observed with oncology drugs are in contradiction with fundamental pharmacologic principles, as exemplified in the labeling of non-oncology drugs. .
Kang
Soonmo Peter
SP
Department of Medicine, University of Chicago, Chicago, IL, USA.
Ratain
Mark J
MJ
D000284:Administration, Oral; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000493:pharmacokinetics; D019540:Area Under Curve; D001682:Biological Availability; D016503:Drug Delivery Systems; D004348:Drug Labeling / Q000592:standards* / Q000706:statistics & numerical data; D005215:Fasting; D005502:Food; D018565:Food-Drug Interactions; D006801:Humans; D007408:Intestinal Absorption; D004364:Pharmaceutical Preparations / Q000008:administration & dosage*; D014481:United States; D014486:United States Food and Drug Administration
D000970:Antineoplastic Agents; D004364:Pharmaceutical Preparations