(Fox News) A new FDA-approved painkiller isn’t set to hit pharmacy shelves until next month, but critics are already warning it could kill—with just two pills. Zohydro, which the FDA gave the green light in October against the advice of its advisory panel, will serve as a powerful pain pill for those who can’t get relief from what’s already out there.

It contains the same basic ingredient (hydrocodone) as Vicodin, but it has 5 to 10 times the power, Forbes notes, and without the added acetaminophen.

As an expert on the advisory board who voted “no” tells NBC News, that acetaminophen deters savvy addicts from loading up on Vicodin for fear of liver damage.

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