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Photo: Kerem Yucel/AFP via Getty Images

The three drug companies that control the insulin market have seen their net sales climb over the past 12 years even as they have had to agree to bigger discounts, according to an Axios analysis of insulins sold by Eli Lilly, Novo Nordisk and Sanofi.

The big picture: Drug manufacturers have largely blamed the broken insulin market — where many people with diabetes are rationing their medication — on other actors within the supply chain. But insulin makers have still been able to collect more money overall and retain their power over the market.

Expand chart
Data: Company documents; Chart: Andrew Witherspoon/Axios

By the numbers: Net global insulin sales, after accounting for rebates, rose by at least 80% from 2008 through 2019 for each of the big three companies.

  • There's a lot of variation in sales by brand (see all of them).
  • For example, revenue from Sanofi's Lantus fell in 2016, after its patent expired and CVS and UnitedHealth excluded it from their coverage lists. Sales shifted to a competitor, Eli Lilly's Basaglar.

Between the lines: Revenue is a function of price and quantity, and both have risen.

  • Insulins' list prices have gone up drastically over the past two decades. List prices matter a lot for the uninsured and people with less generous health plans.
  • Net prices have not increased as much, and for some insulins they have dropped, because pharmacy benefit managers have extracted higher discounts, called rebates, in exchange for giving certain insulins preferred coverage status.
  • The growing prevalence of diabetes has led to higher insulin use, but outside data shows total prescriptions and daily insulin use have grown modestly over the past several years. Eli Lilly, Novo Nordisk and Sanofi all declined to say how many insulin vials and pens they have sold.

The intrigue: Insulin sales are rising even though many of the drugs' patents have expired.

  • Humalog, NovoLog and Lantus all lost patent protection over the past several years. Their revenues have dipped, but they still generate more than $2.5 billion each in net sales.
  • Patents for Humulin and Novolin expired more than 15 years ago, but they still generate more than $1 billion each in net sales.
  • Even though some patents have lapsed, developing cheaper insulins is difficult and costly, and the incumbent players are fighting regulatory agencies to delay competition.

What they're saying: Eli Lilly, Novo Nordisk and Sanofi submitted statements but did not address some questions about their net sales.

  • Eli Lilly attributed higher sales to more people getting diagnosed with diabetes.
  • Novo Nordisk said "a lot of factors like increase of prevalence" contributed to higher sales.
  • Sanofi focused on its lower net price and lower sales in recent years, but not factors that led to higher sales over time.

The bottom line: Discounts and price negotiations have inconvenienced, not fundamentally hurt, insulin makers. And patients, along with the public, are footing the bills.

Go deeper

Updated 4 hours ago - Politics & Policy

Giuliani associate Lev Parnas convicted of campaign finance crimes

Lev Parnas, a former associate of then-President Donald Trump’s personal lawyer Rudy Giuliani. Photo: Stefani Reynolds/Bloomberg via Getty Images

Florida businessman Lev Parnas was convicted Friday on charges of conspiracy to make foreign contributions to political campaigns, according to multiple outlets.

Why it matters: Prosecutors said Parnas, then an associate of former President Donald Trump's personal lawyer Rudy Giuliani, funneled over $150,000 from a Russian businessman into U.S. campaigns as part of an effort to land licenses in the U.S.'s legal cannabis industry.

Supreme Court agrees to hear challenges to Texas abortion law

Photo: Saul Loeb/AFP via Getty Images

The Supreme Court on Friday agreed to hear two cases challenging Texas' abortion law, which bans the procedure as soon as six weeks into pregnancy, but left the law in place in the meantime.

Why it matters: The court is moving extraordinarily fast on the Texas cases, compressing into just a few days a process that normally takes months. And that schedule means the court will take up Texas' ban a month before it hears another major abortion case — a challenge to Mississippi's own 2018 ban on abortions after 15 weeks.

Officials warn 5 key tech sectors will determine whether China overtakes U.S.

Illustration: Aïda Amer/Axios

U.S. intelligence officials responsible for protecting advanced technologies have narrowed their focus to five key sectors: artificial intelligence, quantum computing, biotechnology, semiconductors and autonomous systems.

Why it matters: China and Russia are employing a variety of legal and illegal methods to undermine and overtake U.S. dominance in these critical industries, officials warned in a new paper. Their success will determine "whether America remains the world’s leading superpower or is eclipsed by strategic competitors."