Psychiatric Medications and Reproductive Safety: Scientific and Clinical Perspectives Pertaining to the US FDA Pregnancy and Lactation Labeling Rule.

Pregnancy labeling of prescription medications in the US is in the midst of a major transformation. The FDA's previous system, which used letter ratings to convey drug safety, was simple but led to misunderstandings-both faulty assurances and undue concerns. The new system, established under the Pregnancy and Lactation Labeling Rule, aims for more descriptive and up-to-date explanations of risk as well as context needed for informed decision-making based on available data. In April 2017, a conference titled "Pharmacovigilance, Reproductive Safety, and the Pregnancy and Lactation Labeling Rule" brought together clinicians and researchers, FDA officials, and representatives of the public and industry to discuss a host of questions relating to the new system. This Academic Highlights article summarizes their discussions, which included topics such as how the new system came about and how the new labeling can be used effectively to inform physician-patient conversations about use of medications during pregnancy and ultimately the clinical decisions that follow.​​.

Adolescent dosing and labeling since the Food and Drug Administration Amendments Act of 2007.

IMPORTANCE: During pediatric drug development, dedicated pharmacokinetic studies are generally performed in all relevant age groups to support dose selection for subsequent efficacy trials. To our knowledge, no previous assessments regarding the need for an intensive pharmacokinetic study in adolescents have been performed. OBJECTIVES: To compare U.S. Food and Drug Administration (FDA)-approved adult and adolescent drug dosing and to assess the utility of allometric scaling for the prediction of drug clearance in the adolescent population. DESIGN: Adult and adolescent dosing and drug clearance data were obtained from FDA-approved drug labels and publicly available databases containing reviews of pediatric trials submitted to the FDA. Dosing information was compared for products with concordant indications for adolescent and adult patients. Adolescent drug clearance was predicted from adult pharmacokinetic data by using allometric scaling and compared with observed values. MAIN OUTCOMES AND MEASURES: Adolescent and adult dosing information and drug clearance. RESULTS: There were 126 unique products with pediatric studies submitted to the FDA since the FDA Amendments Act of 2007, of which 92 had at least 1 adolescent indication concordant with an adult indication. Of these 92 products, 87 (94.5%) have equivalent dosing for adults and adolescent patients. For 18 of these 92 products, a minimum weight or body surface area threshold is recommended for adolescents to receive adult dosing. Allometric scaling predicted adolescent drug clearance with an overall mean absolute percentage error of 17.0%. CONCLUSIONS AND RELEVANCE: Approved adult and adolescent drug dosing is equivalent for 94.5% of products with an adolescent indication studied since the FDA Amendments Act of 2007. Allometric scaling may be a useful tool to avoid unnecessary dedicated pharmacokinetic studies in the adolescent population during pediatric drug development, although each development program in adolescents requires a full discussion of drug dosing with the FDA.