Connecticut Attorney General William Tong has a skin condition called rosacea, and he says he takes the antibiotic doxycycline once a day for it.

In 2013, the average market price of doxycycline rose from $20 to $1,829 a year later. That’s an increase of over 8,000%.

Tong alleges in a new lawsuit that this kind of price jump is part of an industry-wide conspiracy to fix prices.

The suit is a whopper — at least 43 states are suing 20 companies and the document is over 500 pages long. It was filed Friday in the U.S. District Court in Connecticut.

The lawsuit alleges that sometimes one company would decide to raise prices on a particular drug, and other companies would follow suit. Other times, companies would agree to divide up the market, rather than competing for market share by lowering prices.

It says these kind of activities have been happening for years, and that companies would avoid creating evidence by making these agreements on golf outings or during “girls nights outs” or over text message.

In several examples, the suit cites call logs between executives at different companies, showing a flurry of phone calls right before several companies would all raise prices in lockstep.

All of this, according to the lawsuit, resulted “in many billions of dollars of harm to the national economy.”

Frankie Grazian/Connecticut Public Radio

Consumers don’t always notice when a generic drug’s price increases rapidly. People without insurance, of course, pay full price, but even people with insurance can feel the impact.

“More people than ever before are paying based on the price of the drugs,” explains Stacie Dusetzina, a professor at Vanderbilt University who studies drug pricing. Often, patients have to meet a deductible before their health plan’s coverage kicks in, so “they pay full price until they reach a certain level of spending, or they pay a percentage of the drug’s price — we call that a coinsurance.”

Surveys show more Americans are having trouble paying out-of-pocket medical costs. The average annual deductible in job-based health plans has quadrupled in the past 12 years and now averages $1,300.

But, Dusetzina says, even if you only pay a modest copay — such as $5 for every prescription you pick up — if your insurance company is paying more for prescription drugs, it can raise your health plan’s premiums the following year. “So ultimately these costs do get borne by the consumer in some way,” she says.

Dusetzina says what this lawsuit alleges is “very disappointing” — a situation in which consumers put up with the high price of branded drugs because of the implicit promise that a generic is coming some day and will eventually bring the price down.

But that outcome doesn’t happen automatically — it relies on healthy competition and market forces to work. If there’s only one generic version available, that drugmaker can set the price at pretty much the same level as the brand name.

“The higher the number of competitors, the more we see price reductions from the branded drug price,” she says. “So the magic number seems to be around four manufacturers.”

And that assumes those drugmakers aren’t talking to each other and agreeing to coordinate rather than compete.

The main drugmaker cited in the lawsuit is Teva, an Israeli company. In a statement, Kelley Dougherty, Vice President of Communications and Brand, Teva North America told NPR that the company is reviewing the allegations internally and that Teva “has not engaged in any conduct that would lead to civil or criminal liability.”

The company has also asserted that there’s nothing new here, and it’s true that the new lawsuit is similar to past lawsuits, though none of them included so many states as plaintiffs.

Connecticut Attorney General William Tong has emphasized that the investigation is ongoing, and given the amount of political appetite there is to bring drug prices down, there are certainly more lawsuits to come.