Insulin regular (human) and Timolol interaction
Insulin regular (human) and Timolol: 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 Insulin regular (human) (AFREZZA) label · effective 2026-05-30
Symptomatic awareness of hypoglycemia may be less pronounced in patients with longstanding diabetes mellitus, in patients with diabetic nerve disease, in patients using medications that block the sympathetic nervous system (e.g., beta-blockers) [see Drug Interactions ( 7 )], or in patients who experience recurrent hypoglycemia.
Alcohol, Beta-blockers, Clonidine, and Lithium Salts Prevention or Management Monitor blood glucose more frequently and modify AFREZZA dosage, as clinically indicated, when used concomitantly with these drugs.
Mechanism and Clinical Effect(s) Concomitant use of pentamidine with AFREZZA may cause hypoglycemia, which may sometimes be followed by hyperglycemia Beta-blockers, Clonidine, Guanethidine, and Reserpine Prevention or Management Monitor blood glucose more frequently and modify AFREZZA dosage, as clinically indicated, when used concomitantly with these drugs.
From the Timolol (Timolol Maleate) label · effective 2024-11-04
Masking of Hypoglycemic Symptoms in Patients with Diabetes Mellitus Beta-adrenergic blocking agents should be administered with caution in patients subject to spontaneous hypoglycemia or to diabetic patients (especially those with labile diabetes) who are receiving insulin or oral hypoglycemic 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.