That was true at one point, but the newer formulations of insulin are old enough to mostly have biosimilars, aka follow-ons, the equivalent of generics for drug

That was true at one point, but the newer formulations of insulin are old enough to mostly have biosimilars, aka follow-ons, the equivalent of generics for drugs produced by bioengineering. Humalog/Lispro/Admelog, Lantus/Basaglar and others, in many cases made by the same company as the original. The prices of insulin have been increased steadily each year by about 11% for the past 20 years. There's nothing about research or costs that justify that for 20 year old drugs. https://www.businessinsider.com/insulin-price-increased-last-decade-chart-2019-9 https://www.businessinsider.com/insulin-price-increased-last... The old formulations (Human insulin, NPH) can be purchased without a prescription at Walmart for fairly low prices - the price that people pay for modern insulin in the rest of the world.