Consumer advocacy group Public Citizen on Tuesday filed a petition with the U.S. Food and Drug Administration seeking to require makers of Botox and several similar injections to include stronger warnings about the risk of a potentially fatal muscle-paralyzing disease.

These injections, which use various versions of botulinum toxins to contract specific muscles by blocking certain nerve signals to erase wrinkles, already have a 'black box' warning in their labels about the risks of the intended effect spreading to other areas. The consumer group asked the FDA to make it clear that these adverse effects could happen even at recommended dosages.

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