HB 3855 expands sales and use tax exemptions for diabetic supplies under Section 151.313(a) of the Tax Code. The bill exempts items such as blood glucose monitoring test strips, glucose tablets, urine test strips for ketones, lancets, insulin pens, blood glucose meters, continuous glucose monitors, insulin pumps, and replacement parts for these items from state sales tax. This exemption aligns diabetic supplies with other medical necessities that are already tax-exempt. The bill takes effect October 1, 2025, and does not retroactively affect prior tax liabilities​.