PANDAS (Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections) is treated with a three-pronged approach: antibiotics to clear the underlying strep infection, anti-inflammatory or immune-based therapies to calm the misdirected immune response, and psychiatric or behavioral support to manage symptoms like sudden-onset OCD, tics, and anxiety. The PANS Research Consortium recommends all three treatment tracks run concurrently rather than sequentially, because no single intervention addresses the full picture.
Antibiotics: Treating the Root Infection
The first step in treating PANDAS is eliminating the strep bacteria that triggered the immune system’s attack on the brain. Penicillin or amoxicillin is the standard choice. Children typically take a 10-day oral course, with amoxicillin often preferred because it can be given once daily. For kids who can’t take penicillin-type drugs, alternatives include certain cephalosporins, clindamycin, or azithromycin.
Some studies have shown improvement in neuropsychiatric symptoms after two to six weeks of antibiotic treatment. That timeline can feel agonizingly slow for families watching a child struggle with severe OCD or emotional outbursts, but it reflects how long the immune response takes to settle once the infection is gone. Not all symptoms resolve with antibiotics alone, which is why the other treatment tracks matter.
Preventing Future Strep Infections
Because each new strep infection can trigger another flare of neuropsychiatric symptoms, some children are placed on long-term prophylactic antibiotics. Azithromycin given three times per week is one commonly used regimen, partly because the simpler schedule makes it easier for families to stick with compared to daily dosing. One clinical trial found that 12 months of prophylaxis with either azithromycin or penicillin reduced symptom flare-ups, though the study lacked a placebo group.
There is no clear consensus on how long prophylaxis should continue. Some children stay on it indefinitely, and the research offers little guidance on when it’s safe to stop. The goal is straightforward: fewer strep exposures mean fewer chances for the immune system to reactivate against the brain.
One option families sometimes ask about is removing the tonsils, since tonsils are a common site for recurring strep. However, two prospective studies found no helpful effect on symptom severity, and the American Academy of Pediatrics does not recommend tonsillectomy or adenoidectomy as a treatment for PANDAS or the broader PANS category.
Anti-Inflammatory and Immune Therapies
PANDAS symptoms are driven by inflammation in the brain, so calming that inflammation is a central part of treatment. The approach depends on how severe the flare is.
For new-onset or mild-to-moderate flares, doctors may prescribe a short burst of oral corticosteroids, typically lasting about five days. Some children then follow a gradual taper. Over-the-counter anti-inflammatory medications like ibuprofen or naproxen are also used as maintenance therapy during flares, sometimes for 10 days or longer. These can take the edge off symptoms while the immune system settles.
For more severe or treatment-resistant cases, intravenous immunoglobulin (IVIG) is the next step. IVIG delivers concentrated antibodies from donated blood plasma and works by modulating the immune system. In one study of children who received between one and seven IVIG courses, improvements were documented in memory (58% of patients), sensory-motor function (37%), and visual-motor integration (30%). An open-label study found statistically significant reductions in OCD severity and overall clinical impairment. IVIG was tolerated well by most participants, with only one patient discontinuing due to severe side effects. Notably, some children in these studies were found to have underlying immune deficiencies that required ongoing IVIG replacement, which highlights the value of immune testing as part of the workup.
Plasma exchange (plasmapheresis), which physically filters out the problematic antibodies from the blood, is another option for severe cases. A landmark study published in The Lancet in 1999 demonstrated benefits of both plasma exchange and IVIG for children with sudden-onset OCD and tic disorders. Plasma exchange is more invasive than IVIG and generally reserved for children who are severely impaired.
Behavioral Therapy for OCD and Anxiety
Even as antibiotics and immune treatments address the biological drivers, the OCD and anxiety symptoms often need direct intervention. Cognitive behavioral therapy, specifically a technique called exposure and response prevention (ERP), is the most effective behavioral approach for pediatric OCD, and pilot studies suggest it works well for children with PANDAS too.
ERP involves gradually exposing a child to the situations, objects, or thoughts that trigger their compulsions, then helping them resist performing the compulsive behavior. For a child with PANDAS who has developed a sudden fear of choking or vomiting, for example, this might mean incremental steps toward trying new foods within a supportive framework. Occupational therapy targeting posture, breathing, and relaxation can help as an add-on, especially for children whose anxiety has a strong physical component.
One important piece of behavioral treatment that often gets overlooked is reducing family accommodation. When parents rearrange routines or participate in rituals to ease a child’s distress (answering the same reassurance question dozens of times, avoiding certain places), it can inadvertently reinforce the OCD cycle. Therapists work with the whole family to gradually pull back these accommodations in a way that feels manageable.
What Recovery Looks Like
Recovery from a PANDAS flare is rarely a straight line. Some children improve dramatically within weeks of starting antibiotics. Others need months of layered treatment before their baseline personality reemerges. Residual OCD can persist even after the infection is cleared and the inflammation has quieted, which is why ongoing behavioral therapy matters.
Children with PANDAS often cycle through flares and remissions, particularly if they’re exposed to new strep infections. Each flare can look slightly different, with varying combinations of OCD, tics, anxiety, mood changes, or cognitive difficulties. Over time, with consistent infection prevention and a treatment team that addresses all three prongs, many children experience longer stretches of wellness and less severe flares when they do occur.