Definition: a rapidly acting form of insulin that is a clear solution and may be administered intravenously as well as subcutaneously; may be mixed with longer acting forms of insulin to extend the duration of effect. Onset of effect occurs in 30 minutes to 1 hour, peak effects are observed in 2–3 hours, and the duration of effect is about 5–7 hours.
Synonym(s): globin insulin
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Examples: glitazone, GI cocktail, etc.