In general, adverse reactions occur within the first week follo wing injection of BOTOX and while generally transient, may have a duration of several months or longer. Localized pain, infection, inflammation, tenderness, swelling, erythema, and/or bleeding/bruising may be associated with the injection. Needle-related pain and/or anxiety may result in vasovagal responses (including e.g., syncope, hypotension), which may require appropriate medical therapy.
Treatment with BOTOX and other botulinum toxin products can result in swallowing or breathing difficulties. Patients with preexisting swallowing or breathing difficulties may be more susceptible to these complications. In most cases, this is a conseq uence of weakening of muscles in the area of injection that are involved in breathing or oropharyngeal muscles that control swallowing or breathing [see Spread Of Toxin Effect].
On February 1, 2017, the company acquired LifeCell, a specialist in regenerative medicine, for $2.9 billion. On April 28, the company acquired Zeltiq Aesthetics, marketer of a cryolipolysis procedure, for $2.4 billion. On June 7, the company announced the acquisition of Keller Medical, a company that manufactures devices for use during breast augmentation surgery. On December 12, the company announced the acquisition of Repros Therapeutics, a developer of drugs for reproductive system diseases.