After the first crisis, the U. S. Federal drug administration imposed new regulations to make drug packaging tamper-resistant.

第一次危机后，美国药品管理局强制推行了新规章以防止药品包装被人做手脚。

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Within days, once it had been established that tainted Tylenol caused the deaths, Burke issued a massive product recall of more than 31 million bottles, and decided not to put the product back on the shelves until new, tamper-resistant packaging could be devised.

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