U.S. doctors online nowAsk doctors free
A member asked:

Made a mistake taking 27 units of humalog instead of 5. lantus (insulin glargine) dose is 27. drank a 25gm carb coke and two dex4 fast acting glucose tabs, 4gmcarb ea?

1 doctor answer1 doctor weighed in
Dr. James Chu
Endocrinology 27 years experience
Humalog (insulin lispro) lasts ~4 hrs: Lantus (insulin glargine) is basal Insulin that works slowly over ~24 hrs to control fasting (non-meal) glucose. Humalog is fast-acting mealtime Insulin that works most action 1-2 hrs after dosing, to control after-meal glucose. If someone injects more Humalog than desired, they should check glucoses every ~30 min until humalog's action is over in ~4-5 hrs. How many carbs needs to be taken varies by each person.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Oct 3, 2016


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.