In a recent editorial on clinical practice guidelines,1 it is stated that, according to the Common Drug Review, the cost of insulin glargine is 5 times as much as generic insulin. According to the Canadian Expert Drug Advisory Committee, the comparative prices for insulin glargine and NPH insulin of $5.50 and $1.60 per 100 units, respectively — that is, just over 3 times the cost of generic insulin.2 We thank Mike Tierney, Director, Common Drug Review, for bringing this matter to our attention.