Treating PANS (Pediatric Acute-onset Neuropsychiatric Syndrome) requires a three-pronged approach: eliminating the infection driving the immune response, calming the immune system itself, and managing psychiatric symptoms while the underlying cause is addressed. No single treatment works alone, and the combination and intensity of therapies depends on how severe the symptoms are.
The Three-Pronged Treatment Framework
PANS happens when an infection triggers the immune system to mistakenly attack part of the brain, causing a sudden onset of obsessive-compulsive symptoms, anxiety, mood changes, or other neuropsychiatric problems. Because the condition involves an infection, an immune malfunction, and resulting psychiatric symptoms, treatment has to target all three layers simultaneously. Skipping one often means the others don’t fully resolve.
The first prong removes the infection fueling the immune response, typically with antibiotics. The second uses anti-inflammatory or immune-modulating therapies to calm the misdirected immune attack on the brain. The third provides psychiatric support through medication and therapy to manage symptoms while the first two prongs take effect.
Treating the Underlying Infection
Because strep is the most common trigger (this specific subset is called PANDAS), antibiotics are usually the starting point. The goal is straightforward: eliminate the infection so the immune system stops producing the antibodies that are cross-reacting with brain tissue. For strep-triggered cases, standard antibiotic courses target the bacteria directly, and many children show noticeable improvement within weeks of clearing the infection.
Other infections can trigger PANS too, including mycoplasma, influenza, and various respiratory viruses. Identifying the specific infection matters because it determines which antimicrobial is appropriate. Some children need extended or prophylactic antibiotic courses to prevent the recurring infections that cause symptom flares.
Anti-Inflammatory and Immune Therapies
For mild flares, over-the-counter anti-inflammatory medications like ibuprofen or naproxen can help reduce brain inflammation. Clinicians often dose these at the same levels used for juvenile arthritis rather than standard pain-relief doses. Some children respond better to one anti-inflammatory than another, so it may take some trial and adjustment.
Corticosteroid Bursts
When symptoms are more than mild, short courses of oral corticosteroids can tamp down the immune response more aggressively. A typical approach involves five consecutive days of oral prednisone at 1 to 2 mg per kilogram of body weight per day, repeated monthly for about three months. These “pulse” courses deliver a strong anti-inflammatory effect while limiting the side effects that come with prolonged steroid use.
IVIG for Moderate to Severe Cases
Intravenous immunoglobulin (IVIG) is one of the more effective options for children with moderate to severe PANS. It works by flooding the body with healthy antibodies that help reset the immune system. A common protocol involves infusions of 1 gram per kilogram of body weight every three weeks for a total of six infusions over roughly 18 weeks. A Swedish study used a higher dose of 2 grams per kilogram monthly for three months and also found significant improvements in OCD severity, global PANS symptoms, and overall clinical impressions, with benefits lasting at least a month after the final infusion.
Plasma Exchange for Severe Cases
When symptoms are severe or don’t respond to other immune therapies, therapeutic plasma exchange (also called plasmapheresis) physically filters the harmful antibodies out of the blood. The American Society for Apheresis classifies this as a second-line therapy for these patients. One study found that children who had been symptomatic for an average of over four years before starting plasma exchange still benefited, with some patients receiving up to nine treatment courses. It’s typically reserved for the most refractory cases because it requires specialized equipment and multiple sessions.
Managing Psychiatric Symptoms
While the infection and immune dysfunction are being addressed, children still need help with the psychiatric symptoms that can be debilitating: severe OCD, anxiety, emotional volatility, tics, sleep disruption, and sometimes regression in school performance or daily functioning.
SSRIs (selective serotonin reuptake inhibitors) are the preferred medication for PANS-related OCD, but children with PANS tend to be unusually sensitive to psychiatric medications. Clinicians experienced with PANS typically start at one-quarter or less of the usual starting dose and increase no faster than every two weeks. This “start low, go slow” approach helps avoid side effects like agitation or worsening symptoms that PANS patients seem more prone to. For acute anxiety, short-term use of sedating medications like antihistamines or clonidine can help bridge the gap while other treatments take hold.
Cognitive behavioral therapy, particularly a form called exposure and response prevention (ERP), is the gold-standard psychological treatment for the OCD component. ERP involves gradually exposing the child to situations that trigger their obsessions while helping them resist performing compulsions. For PANS patients, therapists often need to modify the pace and intensity of ERP because these children can be more emotionally fragile during flares. Therapy tends to become more effective once the underlying inflammation is brought under control.
When Surgery Helps
For children whose PANS is driven by recurrent strep infections, tonsillectomy can be a turning point. A study published in JAMA Otolaryngology found that all nine children who had their tonsils removed experienced reduced neuropsychiatric symptoms at every follow-up point. Four of the nine had complete resolution of symptoms. Even children who had failed to improve with antibiotics alone got better after surgery. At three years post-surgery, the median symptom scores had dropped to near zero.
Tonsillectomy works by removing the tissue where strep bacteria tend to colonize, cutting off the cycle of recurring infections that keep re-triggering the immune response. It’s not appropriate for every PANS patient, only those with documented recurrent strep infections centered in the tonsils or adenoids.
What Recovery Looks Like
PANS recovery is rarely a straight line. Most children improve significantly with treatment, but flares can recur when new infections hit. This is why some families and clinicians opt for prophylactic antibiotics during cold and flu season or before events that increase infection risk, like the start of a new school year.
The timeline varies widely. Some children improve within days of starting antibiotics if the infection is caught early. Others, particularly those who went months or years before diagnosis, may need multiple rounds of immune therapy over many months. The psychiatric symptoms often lag behind the medical improvement, meaning a child’s blood work and infection markers may normalize while OCD or anxiety symptoms take additional weeks or months to fully ease. Ongoing therapy and sometimes continued low-dose medication help bridge that gap.
Flares tend to become less severe and less frequent over time with consistent treatment, particularly when the triggering infections are well managed. Children who receive early, aggressive treatment generally have better long-term outcomes than those whose diagnosis was delayed.