The many surprising uses of Pfizer's newest acquisition: Botox

Allergan, the pharmaceutical company that makes Botox, just agreed to be sold to pharma giant Pfizer.

The $160 billion deal is the year's largest takeover.

One of the reasons Allergan is worth so much is Botox, which had more than $2 billion in annual sales in 2013.

One of the most common pharmaceutical products, Botox is currently known as an anti-wrinkle treatment. However, the drug has many other approved medical uses...