We still don’t know all the details of the Trans-Pacific Partnership (TPP) trade deal tentatively agreed to on Oct. 5 by negotiators from 12 Pacific Rim countries, but already critics are slamming it for many reasons, including its generous concessions to the pharmaceutical industry.

Doctors Without Borders claims the TPP will “go down in history as the worst trade agreement for access to medicines in developing countries.”  That’s because the TPP will extend patent protection for brand-name drugs, thereby preventing similar generic drugs (which are far less costly) from entering the market. This will drive up the prices.

Judit Rius Sanjuan, legal policy adviser for Doctors Without Borders, told vox.com that TPP creates patent-related obligations in countries that never had them before. People in “Peru, Vietnam, Malaysia, and Mexico” will be especially affected, she said. “They’ll face higher prices for longer periods…