History of Botox-maker Allergan acquisitions and investor frustration

AbbVie is acquiring Botox-maker Allergan in a $63 billion deal, the companies said Tuesday.

Allergan has had a long history dating back to the 1940s. Over the years it's gone through major acquisitions, including some that have fallen through.

Visit Business Insider's homepage for more stories.

Allergan, the pharmaceutical company best known for making Botox, on Tuesday agreed to be acquired by AbbVie in a $63 billion deal.

Investors had been unhappy with Allergan's stock performance over the last year, and some have been vocal in calling for change.

Here's how the company went from its start as a small but beloved company out of Southern California in the 1950s to the latest takeover target.

This article was initially published in June 2018 and has been updated.