Botox, also known as onabotulinum toxin A is not a poison but rather acts as a neuromodulator with a number of applications. One common use is to soften the muscles of facial expression but it is also treats excessive sweating among other disorders. In fact, it was utilized largely in children with medical issues prior to its cosmetic application. As a result, it is one of the most studied drugs and with proper and trained medical professionals has been found to be a safe and effective drug.
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