Insulin Nasal Spray May Slow Alzheimer’s Disease

Intranasal insulin therapy may have beneficial effects on cognition and function among patients with Alzheimer’s disease, a pilot study suggested.

Patients who received 20 IU of intranasal insulin daily for four months had improvements on delayed story recall tests (P=0.02, Cohen f effect size=0.36), according to Suzanne Craft, PhD, of the Veterans Affairs Puget Sound Health Care System in Seattle, and colleagues.

And compared with placebo, baseline scores on the Dementia Severity Rating Scale were maintained over the study period in patients receiving either 20 IU or 40 IU of the insulin (P=0.01 for both, Cohen f = 0.38 for 20 IU and 0.41 for 40 IU), the researchers reported online in the Archives of Neurology.