Insuman Rapid is Aventis' brand name for its r-DNA/GE/GM short-acting insulin in its Insuman line of products. Like all R or neutral insulins, nothing is added (suspensions) to alter the insulin's action or speed Other brands of the same type of insulin are: Humulin R and Humulin S by Eli Lilly--Actrapid and Novolin R by Novo Nordisk.