Botox Side Effects

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Botox® is a prescription-only brand name of an injectable form of the toxin botulinum type A, a bacteria that can cause the disease botulism in large quantities.[1] Botox® has been approved by the Food and Drug Administration to treat wrinkles between the brows. It is also used to treat lines and wrinkles on other areas of the face such as crow's feet. It works by paralyzing the muscles temporarily so that the facial expressions that cause these lines cannot be made.[2] Botox® is manufactured by Allergan, and results last for up to four months.[3]

Serious Botox® side effects are rare, but milder side effects such as irritation at the site of injection, dry mouth, and headache occur more frequently. Allergies to the active ingredient are also possible.[3]

Flickr: Vancouver Laser & Skincare Centre
Brand name for Botulinum toxin type A (also called onabotulinumtoxinA)[4]
Manufacturer Allergan
Uses Cosmetic wrinkle injection
Common side effects Discomfort at injection sites, dry mouth, nausea, neck pain, tired feeling, headache[5]
Who should not take Botox®? Women who are nursing or women who are pregnant[1]
Disclaimer The information provided by is not a substitute for professional medical advice, diagnosis, or treatment. Do not take any action based on the information on this page without consulting a physician.
Author Allison Hughes


About Botox

While Botox® has received widespread attention primarily for its cosmetic uses, it is also used to treat medical conditions. These can include neck pain and intense muscle spasms in the neck area, as well as chronic migraines, eyelid spasms, lazy eyes, upper limb spasticity, and excessive sweating of the armpits. Cosmetically, Botox® is used on lines between the eyebrows, furrowed foreheads, and lines extending from the corners of the eyes (commonly called crow's feet).[6]

On August 24, 2011, the FDA approved Botox® for the treatment of incontinence in patients with neurological conditions such as spinal cord injury and multiple sclerosis. In patients diagnosed with these disorders, bladder overactivity prevents the ability to store urine. Injecting Botox® directly into the bladder relaxes it, which enables additional muscle control and reduces incontinence.[7]


About Medication Side Effects

Common possible side effects of prescription and nonprescription drugs

Common Botox Side Effects

The most common unwanted side effect caused by Botox® is bruising on or near the site of the injection. Occasionally, drooping of the eyelids may occur as well. This generally goes away in less than a day. Some Botox® users experience headaches in the first day or two after treatment.[1]

Botox Allergic Reactions

Those who are allergic to Botox® may develop a rash, experience symptoms of asthma (such as wheezing), or feel faint or dizzy. The manufacturer recommends immediate medical attention if asthmatic symptoms or dizziness occur.

In some cases, the paralysis or weakening of the muscles caused by Botox® can be life-threatening. This can happen when patients have trouble breathing, swallowing, or talking. The risk of death is higher among patients who already have such symptoms before using Botox®. Patients who have previously experienced allergic reactions to other drugs that contain botulinum toxins, like Myobloc®, Xeomin®, or Dysport®, are likely to be allergic to Botox® as well.[3]

Botox Precautions and Warnings

  • Botox® has an ingredient called albumin that is derived from human blood. There is an extremely low possibility that this substance can contain viruses that could be passed on to Botox® users, although this has never been reported.[3]
  • Patients are instructed by the manufacturer to discuss any nerve or muscle problems with their physician before taking Botox®. Conditions like Lou Gehrig's disease or Lambert-Eaton syndrome can increase the risk of dangerous side effects.[3]
  • Botox® is not recommended for women who are pregnant or nursing.[1]
  • Patients who have difficulty emptying their bladder, or patients who have a urinary tract infection, are advised by Allergan to avoid using Botox® to treat urinary incontinence.[8]
  • In some instances, patients receiving Botox® have developed bleeding behind the eye. Allergan recommends any patient experiencing vision problems to report the problem to their doctor.[8]


Also See: Beyaz Side Effects, Diet Pills, Contrave Approval, Lorcaserin Approval, Qnexa Approval, Accutane Side Effects, Botox Coupons, Drug Coupons, Botox and Pregnancy



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