FDA Slaps Strictest Warning Label on Botox
By Harry Kimball,  Newser Staff
Posted Apr 30, 2009 2:10 PM CDT
A bottle of Botox.   (AP Photo)
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(Newser) – Botox will now carry the Food and Drug Administration’s strictest warning for pharmaceuticals after the agency raised concerns over the risk of botulism last year, Bloomberg reports. The approval of a rival botulinum toxin for cosmetic purposes prompted the review. The toxin can cause muscle weakness and breathing difficulty, particularly in non-approved applications for muscle spasms. Botox-maker Allergan’s shares fell 3% on the news.