Dexamethasone and Insulin glargine interaction
Dexamethasone and Insulin glargine: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Dexamethasone (Hemady) label · effective 2026-01-09
Hyperglycemia Corticosteroids can increase blood glucose, worsen pre-existing diabetes, and predispose those on long-term therapy to diabetes mellitus, and may reduce the effect of the antidiabetic drugs.
Antidiabetics Corticosteroids, including HEMADY, may increase blood glucose concentrations [see Warnings and Precautions ( 5.1 ) and Adverse Reactions ( 6 )] .
Consider adjusting the dose of antidiabetic agents, as necessary, when coadministered with HEMADY.
From the Insulin glargine label · effective 2026-01-23
Drugs that May Decrease the Blood Glucose Lowering Effect of Insulin Glargine-yfgn Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents…
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.