June 25, 1999
Insulin, Insulin Analogs
Question from South Africa:
What is the difference between Actrapid and Humalog?
Actrapid is standard soluble (“regular”) insulin. Humalog has had its amino acid structure altered so that it is absorbed from the injection site (and therefore acts) more quickly. Accordingly, it’s effect is also shorter — from 10 minutes to two hours. You certainly cannot just swap from one to the other without professional advice.