The FDA has approved Merilog (Sanofi), a biosimilar to rapid-acting insulin aspart (NovoLog), for treatment of patients with type 1 or type 2 diabetes. Merilog is the first rapid-acting insulin biosimilar product to become available in the US.

Three rapid-acting insulin analogs are currently available: insulin lispro, insulin aspart and insulin glulisine. 1-3 All three are approved for use in both type 1 and type 2 diabetes, either by subcutaneous injection, insulin pump or intravenous administration. All three cost more than regular insulin.

The FDA has approved an inhaled, rapid-acting, dry-powder formulation of recombinant human insulin (Afrezza – Mannkind/Sanofi) for treatment of adults with type 1 or type 2 diabetes. In patients with type 1 diabetes, the drug must be used in combination with long-acting insulin. Another inhaled, rapid-acting insulin (Exubera) was approved in 2006 for the same indication, but was withdrawn from the market the following year.

The FDA has approved Fiasp (Novo Nordisk), a new formulation of insulin aspart, to improve glycemic control in adults with diabetes. Fiasp is described by the manufacturer as faster-acting than conventional insulin aspart (Novolog).

The FDA has approved insulin lispro-aabc (Lyumjev – Lilly), a faster-acting formulation of insulin lispro (Humalog), for treatment of type 1 and type 2 diabetes in adults. Fiasp, a faster-acting formulation of insulin aspart (Novolog), was approved in 2017.

View the Expanded Table: Some Available Insulins

The goal of drug therapy for type 2 diabetes is to achieve and maintain a near-normal glycated hemoglobin (A1C) concentration without inducing hypoglycemia; for most patients, the target A1C is <7%. Metformin is the preferred first-line treatment, but most patients with type 2 diabetes eventually require multidrug therapy and/or insulin to achieve glycemic control.