---
title: "Neurotoxins for Pain"
---
## Therapeutic Neurotoxin vs. Cosmetic Botox
This page covers the medical use of botulinum toxin for pain conditions, performed in a clinical context using FDA-approved products and protocols developed for specific medical indications.
The molecule itself is the same one used cosmetically. The doses, injection sites, and clinical purpose are entirely different. Therapeutic neurotoxin is not used to smooth wrinkles or change facial appearance. It is used to interrupt overactive nerve and muscle signaling that contributes to chronic pain.
If you are considering cosmetic Botox, that is a different service and a different conversation. This page is about pain.
## How Therapeutic Neurotoxin Works
Botulinum toxin works by temporarily blocking the chemical signal between nerves and muscles. When injected at therapeutic doses, it reduces overactive muscle contraction and dampens certain nerve pain pathways.
For chronic migraine specifically, the mechanism involves more than muscle relaxation. Botulinum toxin appears to interrupt the release of pain-signaling molecules from nerve endings around the head and neck, which reduces the frequency and severity of migraine attacks over time.
The effect is temporary. Therapeutic injections typically last about three months, after which the cycle is repeated to maintain benefit. This treatment cycle is a defining feature of neurotoxin therapy and is built into the standard protocols.
## BOTOX® Injections for Chronic Migraine
## Conditions We Treat with Therapeutic Neurotoxin
#### Chronic Migraine
Chronic migraine is defined as 15 or more headache days per month, with at least 8 being migraine, for at least three months. It is distinct from episodic migraine and requires different treatment.
OnabotulinumtoxinA is FDA-approved for the prevention of headaches in adults with chronic migraine. The approval was based on the PREEMPT Phase III program, two double-blind, placebo-controlled trials enrolling 1,384 patients across 122 centers in North America and Europe, which showed reduced headache frequency and severity with a tolerable safety profile.
The standard protocol delivers 155 units of onabotulinumtoxinA across 31 specific injection sites in the head, neck, and upper shoulders, takes about 15 to 20 minutes, and is repeated every 12 weeks. Most patients require two or three treatment cycles before they can fully evaluate the response; a single cycle is rarely enough.
#### Cervicogenic Headache
Cervicogenic headache originates from the cervical spine and the muscles, joints, or nerves of the upper neck. The pain is typically felt at the base of the skull and often refers to one side of the head, sometimes mimicking migraine. Neurotoxin injections to specific neck muscles can reduce the muscle-related contribution. The evidence is less robust than for chronic migraine but is supported by clinical experience, and PHI evaluates whether neurotoxin, cervical facet injections, or a combination is the right approach.
#### TMJ Disorders
Temporomandibular joint (TMJ) disorders cause pain in the jaw, face, ear, and sometimes neck. Some forms are driven by overactive jaw muscles, particularly the masseter and temporalis, and neurotoxin injections to these muscles can reduce the hyperactivity and the pain it generates. Systematic reviews of botulinum toxin for TMJ show evidence of medium to low certainty, and botulinum toxin is not currently FDA-approved specifically for TMJ; it is offered off-label based on clinical judgment. Your physician will set realistic expectations during consultation.
#### Other Off-Label Pain Indications
Therapeutic neurotoxin is sometimes used for other persistent pain conditions where overactive muscle or nerve signaling is suspected, including persistent occipital neuralgia, cervical dystonia (an FDA-approved indication), selected myofascial pain conditions, plantar fasciitis in selected patients, and spasticity-related pain. Evidence quality varies significantly. A Cochrane review of botulinum toxin for myofascial pain syndromes found inconclusive evidence to support routine use. Where the evidence is weaker, your physician will tell you so directly.
## Why Patients Choose PHI for Therapeutic Neurotoxin
## What to Expect: Before, During, and After
## Frequently Asked Questions
**Q: Is therapeutic neurotoxin the same as cosmetic Botox?**
The molecule is the same. The dose, injection sites, and purpose are different. Cosmetic Botox uses small doses in specific facial muscles to soften wrinkles. Therapeutic neurotoxin uses larger doses across many sites to interrupt overactive muscle and nerve signaling that contributes to pain. They are different services performed for different reasons.
**Q: Is neurotoxin therapy FDA-approved?**
For chronic migraine, yes. OnabotulinumtoxinA (Botox) is FDA-approved specifically for the prevention of headaches in adults with chronic migraine. For other pain indications including TMJ, occipital neuralgia, and certain myofascial conditions, neurotoxin is used off-label, meaning it is prescribed based on clinical judgment outside its specific FDA approval. Your physician will tell you the regulatory status of any specific use during consultation.
**Q: How long does it last?**
Approximately 12 weeks per treatment cycle. To maintain ongoing benefit, treatment is repeated every 12 weeks. Some patients can extend slightly longer between cycles; others find 10 to 11 weeks fits their pattern better. Your physician will adjust based on your response.
**Q: How fast does it work?**
Effects begin within 7 to 14 days and reach maximum benefit by approximately week 4 to 6. Therapeutic neurotoxin is not a fast-acting treatment. Patients expecting same-day or next-day results often feel that the treatment is not working when it is simply still developing its effect.
**Q: Will I have side effects?**
Common side effects include temporary mild soreness at injection sites and occasional brief neck or shoulder weakness when neck muscles are injected. Less common effects include eyelid drooping (uncommon with chronic migraine protocols when injected correctly), temporary headache in the first 24 hours, and rare allergic reactions. Your physician will review the specific risk profile during consultation.
**Q: How many treatment cycles do I need before I know if it is working?**
For chronic migraine specifically, two to three full treatment cycles (about 6 to 9 months) are typically required to fully evaluate response. Some patients respond after the first cycle; many do not show meaningful benefit until the second or third cycle. Stopping after one cycle often misses patients who would have responded.
**Q: Is therapeutic neurotoxin covered by insurance?**
For chronic migraine specifically, some insurance plans may cover therapeutic Botox as a separate medication benefit when prescribed for an FDA-approved indication. Your physician's office can discuss specific coverage options at consultation.
**Q: What is the difference between Botox, Dysport, Xeomin, and Myobloc?**
These are different brand-name botulinum toxin products with slightly different formulations. They are not interchangeable on a unit-for-unit basis but are clinically similar. Most clinical evidence for chronic migraine is specifically for onabotulinumtoxinA (Botox), which is the only product FDA-approved for this indication.
**Q: Can I have therapeutic neurotoxin and cosmetic Botox at the same time?**
PHI does not offer cosmetic neurotoxins. If you receive cosmetic neurotoxins elsewhere, you must inform your physician so the doses can be coordinated to avoid exceeding safe total dosing across a treatment period.
**Q: How much does therapeutic neurotoxin cost at PHI?**
Pricing depends on the indication, total units required, and specific protocol; chronic migraine treatment uses 155 units per cycle following the FDA-approved protocol. All costs are disclosed at consultation, with no surprise billing.
**Q: Do you accept international patients?**
Yes. PHI regularly treats patients from outside Los Angeles, including Las Vegas, Palm Springs, London, and other international locations. Because therapeutic neurotoxin requires repeat treatment every 12 weeks to maintain benefit, international patients should plan for cycles that fit their travel schedule.
> OnabotulinumtoxinA: a review in the prevention of chronic migraine. Peer-reviewed via PMC.
— [Frampton JE, Silberstein S.](https://pmc.ncbi.nlm.nih.gov/articles/PMC5367647/)
> Botulinum toxin for myofascial pain syndromes in adults. Cochrane Database of Systematic Reviews.
— [Soares A, et al.](https://pmc.ncbi.nlm.nih.gov/articles/PMC7202127/)
> Effects of botulinum toxin type A in patients with painful temporomandibular joint disorders: a systematic review and meta-analysis. Annals of Medicine and Surgery, 2024.
— [Zhu M, et al.](https://pmc.ncbi.nlm.nih.gov/articles/PMC11230827/)
> Botox (onabotulinumtoxinA) prescribing information, chronic migraine prevention. U.S. Food and Drug Administration.
— [U.S. Food and Drug Administration](https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/103000s5302lbl.pdf)
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