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Botox
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Skin Hair Nails

Botox

Botox is a medical treatment derived from the Clostridium botulinum toxin used to address various neurological and cosmetic conditions by weakening or paralyzing specific muscles.

Overview

Botox is a drug made from a toxin produced by the bacterium Clostridium botulinum. While this is the same toxin that causes the food poisoning known as botulism, doctors use it in small, controlled doses to treat a variety of health issues.

Medical Uses

Botox is utilized for several conditions, including:

  • Temporary smoothing of facial wrinkles and appearance improvement
  • Severe underarm sweating
  • Cervical dystonia: A neurological disorder causing severe neck and shoulder muscle contractions
  • Blepharospasm: Uncontrollable blinking
  • Strabismus: Misaligned eyes
  • Chronic migraine
  • Overactive bladder

How It Works

Botox injections function by weakening or paralyzing specific muscles or by blocking certain nerves. The effects typically last between three to twelve months, depending on the condition being treated.

Side Effects & Precautions

Common side effects include pain, swelling, or bruising at the injection site. Other potential side effects include:

  • Flu-like symptoms
  • Headache
  • Upset stomach
  • Temporary drooping eyelids (if injected in the face)

Botox should not be used by individuals who are pregnant or breastfeeding.

Frequently Asked Questions

Botox is classified as pregnancy Category C and is not recommended during pregnancy or while nursing because safety data are limited; discuss alternative therapies with your provider.
When administered by an experienced clinician, the dose is targeted to specific muscles, minimizing spread. Temporary weakness may occur near the injection site (e.g., drooping eyelid) but typically resolves within 2‑4 weeks without affecting overall function.
Most patients see a softening of lines within 3‑5 days, with peak results around 1‑2 weeks.
Injections usually reduce migraine days for about 10‑12 weeks; repeat treatments are scheduled every 3 months to maintain benefit.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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