before they even start. it's the #1 prescribed branded chronic migraine treatment. so far, more than 5 million botox® treatments have been given to over eight hundred and fifty thousand chronic migraine patients. effects of botox® may spread hours to weeks after injection causing serious symptoms. alert your doctor right away, as difficulty swallowing, it speaking, breathing, eye problems, ion. ion. side effects may include allergic reactions, neck and injection site pain, fatigue, and headache. don't receive botox® if there's a skin infection. tell your doctor your medical history, muscle or nerve conditions and medications, including botulinum toxins, as these may increase the risk of serious side effects. in a survey, 92% of current users said they wish they'd talked to their doctor and started botox® sooner. so, ask your doctor if botox® is right for you. learn how abbvie could help you save on botox®.