What Treats NMOSD Neuropathic Pain and Tonic Spasms?

Neuromyelitis optica spectrum disorder (NMOSD) can cause chronic symptoms that significantly impact your daily life. Two of the most challenging are neuropathic pain (ongoing burning or electrical nerve pain) and painful tonic spasms (sudden, intense muscle contractions) ^[1][2]. These symptoms often occur together, especially in the aftermath of a spinal cord attack (myelitis).

It is important to know that the medications and therapies discussed here are used to manage symptoms—they do not treat the underlying inflammation of NMOSD or prevent future attacks. You must continue your prescribed NMOSD disease-modifying treatments to prevent relapses, even if a pain medication makes you feel better.

Recognizing When to Get Urgent Help

Before adjusting any symptom medications, it is critical to determine if your pain or spasms mean something new is happening. Old NMOSD symptoms can temporarily flare up due to triggers like a fever, urinary tract infection (UTI), constipation, or medication changes. However, new or rapidly worsening spasms and pain can also be a sign of a new NMOSD attack (relapse) ^[3][4].

Because it is difficult to reliably tell the difference at home, prompt evaluation is essential. Early assessment is critical because treating an active relapse quickly—often with high-dose intravenous steroids, and sometimes plasma exchange (a procedure that filters harmful antibodies from your blood)—may limit lasting damage ^[4][5].

Go to the nearest emergency department and tell them you have NMOSD if you experience:

• Severe, new weakness in your arms or legs ^[4]
• Sudden vision loss or changes ^[6]
• Inability to walk or urinate ^[4]
• Difficulty breathing or swallowing ^[6]
• Persistent, uncontrollable hiccups or vomiting ^[6]

Managing Painful Tonic Spasms (PTS)

Painful tonic spasms (PTS) are brief, involuntary, and intensely painful muscle tightenings that usually last seconds to minutes. They can be triggered by movement, touch, or emotional stress, and commonly occur during recovery from a spinal cord attack ^[2][7].

• What to do during an episode: Try to sit or lie down safely to prevent a fall. Do not forcefully restrain or aggressively stretch the muscle during the spasm, as this can cause injury. Keep a brief diary of when the spasms occur, how long they last, and any triggers to share with your doctor.
• Sodium-channel blockers: To stop these spasms, specialists commonly use certain anti-seizure medications (like carbamazepine or oxcarbazepine) that block sodium channels in the nerves, helping to calm abnormal nerve signals ^[8]. While observational studies suggest these are often effective for NMOSD spasms, the evidence is limited and these drugs must be monitored carefully ^[8]. They can cause dizziness, sedation, low blood sodium, liver or blood-count issues, and rarely, severe blistering skin rashes ^[9][10].
• Alternatives: If these first-choice options are not tolerated, specialists may try other anti-seizure medications off-label, such as lacosamide, topiramate (which can have cognitive side effects), or eslicarbazepine ^[11][12][13].
• Muscle relaxants: Medications like baclofen may be used, particularly if you also have spasticity (constant, sustained muscle stiffness) ^[3].

Never start, stop, or change the dose of these medications without consulting your prescriber.

Managing Central Neuropathic (Burning) Pain

Central neuropathic pain results from damage to the spinal cord or brain and usually feels like a constant burning, aching, or “pins and needles” sensation ^[14]. The treatments for this ongoing nerve pain are different from those used for sudden spasms.

• Gabapentinoids: Medications like gabapentin and pregabalin are commonly recommended first-line options for general nerve pain ^[15]. They require careful dosing based on your kidney function ^[16]. Because they can cause significant dizziness and sleepiness, they can increase your risk of falls—especially if NMOSD has already affected your balance. They also carry a risk of respiratory (breathing) depression, particularly if combined with alcohol, opioids, or other sedating drugs ^[17]. Review all sedating medicines with your doctor, and avoid alcohol or driving until you know how the medication affects you.
• Antidepressants: Certain antidepressants, such as tricyclic antidepressants (TCAs) and serotonin-norepinephrine reuptake inhibitors (SNRIs, like duloxetine), are also considered first-line for nerve pain because they alter how the brain processes pain signals ^[15][18].
• Opioids and Tramadol: Strong opioids and tramadol are generally reserved as second- or third-line options due to their lower effectiveness for nerve pain, high risk of dependence, sedation, and potential to cause dangerous serotonin or respiratory interactions ^[15][19][20].

All of these medications must be tapered off slowly under medical supervision to avoid withdrawal or dangerous side effects ^[21].

Non-Pharmacological Treatments and Rehabilitation

Pain management in NMOSD usually requires a team approach combining medications with physical and psychological support ^[22].

• Individualized Rehabilitation: Working with a physical or occupational therapist who understands NMOSD is vital ^[23]. A therapist can provide a personalized plan for stretching, strengthening, and using assistive devices. Safe, tailored movement is important, as unsafe stretching or overexertion can accidentally trigger spasms or increase the risk of falls ^[24].
• Psychological Support: Living with unpredictable, severe pain and disability is frightening and exhausting, and it is completely normal to feel anxious or depressed ^[25][14]. Therapies like Acceptance and Commitment Therapy (ACT) can help you cope with the distress of chronic symptoms; seeking mental health support does not mean your pain is “in your head” ^[26].
• Scrambler Therapy: A small, preliminary trial in NMOSD investigated Scrambler therapy—an experimental treatment using patterned electrical stimulation on the skin—and found it reduced pain scores ^[27]. While more research is needed to prove its effectiveness and safety, it may be an option to discuss with a pain specialist.