Which drug is classified as a short-acting insulin?

Humalog is classified as a short-acting insulin because it is a rapid-acting insulin that begins to work quickly after injection, typically within 15 minutes, peaks in about 1 to 2 hours, and has a duration of action of about 3 to 5 hours. This rapid onset makes it particularly effective for controlling postprandial (after meal) blood glucose levels since it can be taken just before eating.

In contrast, Lantus is an example of long-acting insulin, designed to provide a steady level of insulin over a 24-hour period without significant peaks. Humulin is a term that refers to various formulations of human insulin, including both short and intermediate-acting forms, while NovoLog is also a rapid-acting insulin similar to Humalog, but it is important to identify that Humalog is specifically noted for its rapid-action profile.