New guidelines have yielded mixed news about alternative uses for the anti-wrinkle drug Botox. The guidelines, developed by the American Academy of Neurology, have found that Botox is safe and effective to prevent excessive sweating of the armpits and hands and to treat many involuntary muscle disorders. But they also show that Botox probably does not help combat migraines and chronic tension headaches. Experts say that given the available data, Botox injections should not be used to treat...