Field Guide · Deconstructed
For the immune-driven PANS kid, IVIG can be the turning point. But the infusion day is where parents panic: the pre-meds, how fast it goes in, what to watch, and what to do when the headaches or strange new behaviors hit. Here’s the honest, practical version — so you walk in knowing what to ask the infusion team.
I walked this part of the labyrinth myself — knocked on the doors, read the research, and came back with the map. You don’t have to find the way out alone.
Everything here is framed as questions to bring to your prescriber and infusion nurse — not medical instructions. Doses and rates are set by your team for your child’s weight.
This addresses the autoimmune attack on the brain — the antibody-driven neuroinflammation behind PANS. When the driver is genuinely immune-mediated, the OCD, tics, anxiety, and rage tend to ease as IVIG calms that attack. The honest caveat: only testing — the immune workup (immunoglobulins, IgG subclasses, the SPAD challenge) — tells you whether this is actually your child’s driver; if the picture was never immune-mediated, IVIG has little to act on.
IVIG = intravenous immunoglobulin — concentrated antibodies pooled from thousands of healthy donors, dripped in through an IV. In PANS it isn’t given to fight an infection; it’s an immunomodulator — it helps calm and re-regulate an immune system that has turned on the child’s own brain (the autoantibody/neuroinflammation picture behind PANS). Think of it as a reset for a misfiring immune response, not a kill.
IVIG is for the immune-driven case — not every PANS kid, and not a first move:
PANS Consortium, Part II — Immunomodulatory Therapies · Neuroimmune Foundation: IVIG 101
IVIG is expensive and insurers fight it, so the workup is what gets you approved:
Start at the top and follow your situation. Tap to open.
Immune-driven, severe, or low-Ig/SPAD → IVIG is on the table. Mild/clearly infection-driven and improving on antibiotics → it’s likely not the next step yet. Not sure → that’s the immune workup’s job.
Immunoglobulins + IgG subclasses + vaccine titers / SPAD challenge. Documented deficiency or a clear autoimmune-encephalitis picture is what wins the insurance fight.
Hydrate hard for 1–2 days before. Pre-meds ~30 min prior. Run it SLOW — the single biggest lever against side effects. Watch vitals + the IV site. (Details just below.)
Slow or pause the drip, hydrate harder, pre-meds/steroid, dark quiet room. A headache is the most common reaction — usually manageable, rarely a reason to stop for good. Severe/persistent (stiff neck, won’t let up) → call the team. (Details below.)
A transient worsening can follow IVIG (immune activation) before improvement shows — sometimes weeks. Don’t panic at a post-infusion dip; support, track on the daily log, and know when to call.
Given ~30 minutes before the infusion to blunt reactions. Typical pediatric regimen (your team doses by weight):
The rate is the #1 lever against side effects. IVIG is started at a low rate and stepped up gradually — commonly a 15-minute rate-escalation protocol (increase only if the last step was tolerated). Slower infusions mean far fewer headaches, vomiting, and aseptic meningitis.
15-minute rate-escalation lowers headache/migraine · Neuroimmune Foundation
This is the most common IVIG side effect — from a bad headache to an aseptic-meningitis-like reaction (severe headache, stiff neck, light sensitivity, nausea). It can start during the infusion or up to ~72 hours after, and kids with a headache history (and the high 2 g/kg dose) are higher-risk. It is almost always self-limiting and does NOT mean you can never do IVIG again.
What helps: slow or pause the rate; hydrate hard (before, during, and for days after — the single best prevention); pre-meds (Tylenol/Benadryl), and a steroid often resolves it (and can avoid a spinal tap); magnesium, a dark, quiet room, and rest. Call the team if it’s severe, persistent, or comes with a stiff neck or fever.
A temporary behavioral flare can follow IVIG — new or intensified OCD, rage, anxiety, or regression — before things turn for the better. It’s thought to be the immune system stirring as it re-regulates, and improvement can take weeks to a few months to show. Don’t read a post-infusion dip as failure. Support the basics (calm, sleep, hydration, low demands), log it daily so you can see the real trajectory, and call your doctor if the worsening is severe, includes safety concerns, or doesn’t start settling.
Parents ask the right question: what does IVIG actually get rid of, and what does it leave behind? The honest answer is that IVIG works on the immune attack on the brain — it is not, and was never meant to be, a cure for the underlying cause. Here is what the evidence and clinical experience actually support.
Frame it clearly: IVIG calms the immune attack. It is not a cure for the underlying cause — treat the infection, the mold, the immune deficiency, and the methylation/detox bottleneck, or the relief won’t hold.
The honest bottom line on evidence: the RCT base is thin and mixed — the strongest controlled trial was negative on its primary endpoint — and much of the support for IVIG in PANS is clinical experience and case series, not gold-standard proof. For the right immune-driven child it can still be the turning point; just go in with clear eyes.
Because the relief only holds when the trigger is gone, IVIG belongs after the groundwork. Ask whether all five are true:
The daily map’s “IVIG decision” leads here.
The barrier is almost never the medicine — it’s insurance. Insurers routinely deny IVIG for “PANS” (they call it off-label), but they cover it for primary immunodeficiency. So the whole game is to document the immune deficiency and bill IVIG under THAT — not under PANS. Here’s how families do it when there’s no $1,500 to spare, no three months to wait, and only a “maybe” on coverage.
These are the labs that turn a denial into an approval — ask your doctor to run them up front:
The move: get the immunodeficiency diagnosis (SPAD, low IgG, or CVID) on paper and the medical-necessity letter writes itself. IDF — Insurance Coverage for Ig Therapy + their model coverage policy & appeal tips
Start with a board-certified clinical immunologist (allergy/immunology) — not a cash-pay PANS specialist. Here’s why: the immunologist takes insurance, runs the immunoglobulin + SPAD workup, and can put the immunodeficiency diagnosis on paper — the one thing that gets IVIG covered. The same infusion billed under “PANS” usually gets denied; billed under SPAD / low IgG it gets approved. Find a PANS-aware immunologist through the directories below, and ask on the first call: “Do you run the SPAD workup and bill IVIG under immunodeficiency?”
Some PANS immunologists get IVIG approved through the immunodeficiency route and see families by telehealth — but Plan B doesn’t vouch for any individual’s outcomes. Find them through the directories and check parent reviews (coming) before you commit:
When you call, ask directly: “Do you run the SPAD / immunoglobulin workup and bill IVIG under immunodeficiency? Do you do telehealth? Have you gotten it covered for kids like mine?”
Cost reality: denied, high-dose IVIG runs into the tens of thousands per round out of pocket — which is exactly why the immunodeficiency workup-for-approval matters so much. Get the diagnosis, let the pharmacy advocate fight the prior-auth, and you may never touch that bill.
Don’t do this maze alone. Minta knows exactly which labs qualify you, drafts the medical-necessity language, and points you to the practitioners and assistance programs that get IVIG covered — so you stop guessing and start moving. Let Minta do this for you →
Credentials, polish, and how conventional an approach sounds tell you little about whether a practitioner will help your child — or harm them. What does: their behavior and their incentives. Watch those.
For the immune-driven PANS child — especially with documented SPAD/immune deficiency — IVIG can be the turning point. The infusion day is far less scary once you know the levers: hydrate hard, run it slow, pre-medicate, watch the vitals and the IV, and treat a headache or a brief flare as expected and manageable, not as failure. This is parent education, not medical advice — bring it to your prescriber and infusion team as questions.
This is a lot to carry — you don’t have to do it alone. Minta has all of this synthesized. She’ll help you see whether your child fits the immune picture, which workup gets you approved, and exactly what to ask the infusion team — then walk infusion day with you. Let Minta do this for you →
Plan B does not partner with drug companies or doctors, and we never endorse anyone whose healing isn’t verified by families. We show you the options and how to vet them yourself — and we’re building parent verification: look up a practitioner and see real family reviews before you trust them. Universal bad reviews? Skip.