Khalaf Bushara and David Park were the first to demonstrate a nonmuscular use of BTX-A while treating patients with hemifacial spasm in England in 1993, showing that botulinum toxin injections inhibit sweating, and so are useful in treating hyperhidrosis (excessive sweating). BTX-A has since been approved for the treatment of severe primary axillary hyperhidrosis (excessive underarm sweating of unknown cause), which cannot be managed by topical agents.
If you undergo Botox treatments for migraines, your doctor will typically administer them once every three months. Depending on your response to Botox, your doctor will recommend a length of time for your treatment plan. Each session will last between 10 and 15 minutes. During the sessions, your doctor will inject multiple doses of the medicine into specific points along the bridge of your nose, your temples, your forehead, the back of your head, your neck, and your upper back.
Botox should definitely last longer than a few weeks, but how much longer varies. First time Botox users, for example, might experience Botox wearing off in less than 3 months. However, as facial muscles get conditioned to Botox, results should lengthen. Botox injections around the eyes can also last shorter than 3 months. Men, on the other hand, tend to need more Botox than women. Whatever the case, Botox results should generally last around 3 months, give or take a few days.
Investors have been unhappy with Allergan's stock performance over the last year, and some have expressed interest in seeing the pharma company explore splitting up. On Wednesday, Allergan announced it plans to sell its women's health and infectious disease businesses. The news sent Allergan's stock down 2%, suggesting the move didn't go as far as some would like.
Botulism toxins are produced by bacteria of the genus Clostridium, namely Clostridium botulinum, C. butyricum, C. baratii and C. argentinense, which are widely distributed, including in soil and dust. As well, the bacteria can be found inside homes on floors, carpet, and countertops even after cleaning. Some food products such as honey can contain amounts of the bacteria.
Botox has also been shown to prevent chronic migraines, but there, it's unclear exactly why Botox works. (For doctors, reaching a firm understanding of how Botox prevents migraines will be tricky, since they don't know for certain what causes the severe headaches in the first place.) "There were multiple clinical trials for migraines, and most of them failed," says Dr. Mitchell Brin, senior vice president of drug development at Allergan and chief scientific officer for Botox. "It took a long time to figure out where to inject and how much." Today people who receive Botox for migraine prevention get 31 injections in different spots on their head and neck. The effects of Botox can last about three to six months depending on the condition.
Ray Chester, an attorney in Austin who has represented several plaintiffs in lawsuits against Allergan, says that just about all the cases he has handled involved off-label use of the drug. In 2014 a New York couple argued that Botox, which they chose to try off-label to treat their son's cerebral-palsy symptoms, caused life-threatening complications. The family was awarded $6.75 million by a jury. Allergan, which initially planned to appeal, ended up privately settling the case with the family, and the terms of the settlement have been kept confidential.