As trade ministers from around the world continued meeting in Atlanta on Thursday for final-stretch negotiations on the corporate-friendly Trans Pacific Partnership (TPP), civil society groups demonstrated on the streets in a final salvo against a deal they describe as “a wholesale auction of our rights, our freedoms, and our democracy to multinational corporations who put profits over people.”

“They’re getting close, but we can stop them,” reads the Citizens Trade Campaign’s call-to-action. “If we do, and the Atlanta round fails, many believe the TPP could be knocked off track indefinitely.”

High-level officials including Japan’s Economic and Fiscal Policy Minister Akira Amari and New Zealand Prime Minister John Key have warned that if the talks do not wrap up this week, the 12-nation trade agreement could be put on ice for years.

“The window of opportunity to complete [the] TPP is closing so you wouldn’t say it’s impossible to complete the deal if it doesn’t take place in Atlanta, but it does become more difficult,” Key told the Asia Society in New York this week.

Citing such remarks, organizers of Thursday’s demonstration declare: “Very rarely do protests have as much potential for immediate results as this one.”

To coincide with Thursday’s action, activists from SumOfUs.org, MoveOn.org, and ActionStation ran a full-page ad in the local alt-weekly Creative Loafing slamming the secretive trade deal.

“In a final effort to strike a TPP deal, companies and governments have once again tried to organize secret closed-door negotiations to lobby against the interests of workers all around the world,” said Jon Lloyd, campaign director for SumOfUs. “All the secrecy means we don’t know the gory details of what it contains, but we do know they’re planning attacks on internet freedom, environmental protections, and affordable medication and that is unacceptable.”

In particular, activists in Atlanta are highlighting how the TPP could slash access to affordable medicines. As the Japan Times reports, drug patents, tariffs on automobiles, and market access for dairy products remain among the “thorny issues” for negotiators.

“U.S. negotiators are pushing for the TPP to include 12 years of data protection for life-saving biologics,” wrote Marc Perrone, international president of the United Food and Commercial Workers (UFCW), in a letter sent Tuesday to U.S. Trade Representative Michael Froman. “This demand puts the profits of big pharmaceutical companies above the health and welfare of every American family and effectively risks lives by delaying access to lower cost generic drugs.”

Perrone continued: “For U.S. negotiators to insist that the TPP protect these high drug prices rather than the hard-working Americans who buy them is completely unacceptable.”

The AARP, which advocates for people 50 and older, chimed in, with senior legislative representative KJ Hertz explaining on Thursday that anti-competitive provisions within the TPP proposal “would extend brand drug patent protections through ‘evergreening’ drug products that provide little to no new value.”

These intellectual property provisions “also prolong high prescription drug costs for consumers, link approval to market generic or biosimilar drugs to existing patents in a way that protects only brand drugs, and increase data exclusivity periods for biologics that further delays access by other companies to develop generic versions of these extremely high-cost drugs,” Hertz added.

However, TPP opponents are quick to point out (pdf) that even if a deal is reached this week, Congress will not debate and vote on it until late winter because, as per the Fast Track legislation passed earlier this year, President Barack Obama cannot sign the deal without giving lawmakers 90 days’ notice.

As the New York Times notes, that timeline would put a TPP vote right “in the heat of the states’ presidential nominating contests.”

In a memo to reporters (pdf) circulated late last week, Public Citizen’s Lori Wallach called that scenario a political “nightmare”—at least for the corporate forces pushing the pro-corporate trade pact.