Diabetes Dialogue: FDA Approves Afrezza Inhaled Insulin for Pediatric Patients

Welcome back to Diabetes Dialogue: Technology, Therapeutics, & Real-World Perspectives!

In this episode, cohosts Diana Isaacs, PharmD, and Natalie Bellini, DNP, discuss the recent FDA approval of MannKind’s inhaled insulin Afrezza for pediatric patients aged 6 years and older with both type 1 and type 2 diabetes, describing the decision as a major milestone in diabetes therapeutics and the first expansion of the therapy beyond adults. The episode centers on the clinical implications of the approval, the pharmacologic advantages of inhaled insulin, and the practical considerations surrounding implementation in pediatric care settings.

The hosts review findings from the INHALE-1 trial, which enrolled 230 pediatric participants aged 4 to 17 years and compared inhaled insulin used alongside basal insulin with standard multiple daily injection (MDI) therapy over 56 weeks. Bellini emphasizes that the study achieved its primary objective of demonstrating glycemic outcomes comparable to traditional insulin regimens, noting that insulin studies are generally designed to establish equivalence rather than superiority. Beyond similar glycemic control, the hosts highlight several clinically meaningful secondary observations, including stable BMI among participants receiving inhaled insulin compared with weight gain in the MDI cohort, increased treatment satisfaction reported by both adolescents and parents of younger children, comparable hypoglycemia rates, and the absence of new safety concerns. Bellini also notes that no decline in lung function was observed among participants using inhaled insulin, despite historical concerns surrounding pulmonary safety with inhaled therapies.

A major focus of the discussion is the physiologic pharmacokinetic profile of Afrezza, which Isaacs characterizes as the most physiologic insulin currently available. She explains that inhaled insulin demonstrates measurable activity within approximately 12 minutes, peaks within 35 to 45 minutes, and clears the bloodstream in roughly 90 minutes. The hosts contrast this with subcutaneous rapid-acting insulin analogs, including ultra-rapid formulations, which retain a prolonged “tail” of insulin activity that can increase hypoglycemia risk. Isaacs and Bellini suggest that the shorter duration of inhaled insulin may reduce the cycle of overtreating hypoglycemia and subsequent rebound hyperglycemia, thereby potentially contributing to the absence of weight gain observed in the trial. Bellini further emphasizes that the rapid onset and offset of inhaled insulin restore some of the flexibility and spontaneity often lost in intensive insulin therapy, particularly around meal dosing and correction strategies.

The conversation also situates inhaled insulin within the broader framework of individualized diabetes management and the ADA Standards of Care. Isaacs stresses that the approval should not be viewed as competing with automated insulin delivery (AID) systems, but rather as expanding patient choice. The hosts discuss how inhaled insulin may be especially valuable for individuals who do not wish to wear insulin pumps, desire periodic breaks from technology, or want to reduce the burden of injections. Isaacs additionally highlights the growing prevalence of pediatric type 2 diabetes and notes that, despite advances in incretin-based therapies, many youth still require insulin therapy. In that context, the possibility of pairing inhaled mealtime insulin with emerging once-weekly basal insulin formulations and GLP-1 receptor agonists is presented as a potentially transformative strategy for minimizing injection burden.

Bellini and Isaacs also address practical implementation challenges within school settings. Because inhaled insulin acts rapidly, Bellini notes that administration timing may need to shift from the nurse’s office to the cafeteria environment to avoid hypoglycemia if meals are delayed. At the same time, both hosts recognize that the flexibility of postprandial dosing could offer advantages for children with inconsistent eating patterns or concerns about privacy surrounding insulin administration. They further discuss the utility of inhaled insulin for rapid glucose corrections, noting that additional doses can be administered far sooner than with traditional injected rapid-acting insulin.

The episode concludes with discussion of anticipated affordability initiatives from MannKind Corporation, including bridge programs designed to improve early access and reduce financial barriers to therapy. Isaacs and Bellini commend the company’s efforts to secure pediatric approval and express optimism that broader availability of inhaled insulin will expand individualized treatment options, improve patient satisfaction, and enhance quality of life for children and adolescents living with diabetes.

Editors’ Note: Isaacs reports disclosures with Dexcom, Abbott, Lilly, Novo Nordisk, Medtronic, Insulet, and others. Bellini reports disclosures with Abbott Diabetes Care, MannKind, Povention Bio, and others.

References

1: HOLDER