What Is VIP? Dosage, Half-Life & How to Track It

What VIP is and how it works

VIP is a 28-amino-acid peptide hormone your body produces naturally in nerve cells throughout the gut, lungs, and brain, where it acts as both a neurotransmitter and a signaling molecule. Its name comes from its first-discovered effect — vasodilation in the intestines — but its broader role touches the immune system, circadian rhythm, and inflammatory regulation.

The mechanism of most interest in current use is anti-inflammatory and immunomodulatory: VIP binds receptors on immune cells and appears to help shift an overactive inflammatory response back toward baseline, alongside supporting mucosal barrier integrity in the lungs and gut. That immune-regulating role is the basis for its most well-known off-label use — as the final step of Dr. Ritchie Shoemaker’s multi-stage protocol for CIRS (chronic inflammatory response syndrome), often associated with water-damaged-building / mold exposure, used only after earlier protocol steps (binders, MARCoNS treatment, hormone correction) have been completed.

Worth being direct about the evidence: VIP's physiological role is well characterized in the research literature, but its use as a CIRS treatment is a specific clinical protocol with a devoted following and thinner independent trial support outside that community. It is compounded by specialty pharmacies rather than sold as a standard research-peptide vial, and Shoemaker's protocol specifically requires clearing other CIRS markers first — it is not a standalone first step.

Typical dosing & administration

Within the Shoemaker CIRS protocol, VIP is compounded into a preservative-free nasal spray, typically dosed as 1 spray per nostril, 4 times a day for a set course (commonly around 4 months), only after prerequisite protocol steps have cleared. Because it is compounded rather than sold as a lyophilized powder, there is no standard BAC-water reconstitution step the way there is for an injectable peptide — the pharmacy delivers a ready-to-use spray at a set concentration.

This makes VIP an outlier in this library: the practical tracking need is less about reconstitution math and more about dose timing and adherence across a multi-week course, plus the CIRS symptom markers the protocol is meant to move.

Half-life & what it means for frequency

VIP clears from the blood extremely fast — its half-life is measured in minutes (commonly cited around 1–2 minutes), among the shortest of any compound in this library. That is the direct reason it is dosed multiple times a day rather than once: there is no depot effect and nothing to accumulate, so consistent re-dosing is what sustains any local mucosal or immune effect.

Because of that rapid clearance, missing a dose within the 4×-daily schedule has essentially no carryover from the prior dose to lean on — adherence within the day, not just across the week, is what the schedule is built around.

What to track & common side effects

Reported side effects are generally mild — nasal irritation, occasional flushing, or lightheadedness shortly after a dose. Because VIP is typically used within a structured, physician-directed protocol, most practitioners also track a battery of CIRS-specific lab and symptom markers (VEGF, MSH, C4a, and a subjective symptom score) alongside the medication itself.

What is most practical to log day to day is the spray schedule — whether all four daily doses happened — since a multi-month course with 4×-daily dosing is exactly the kind of protocol that quietly slips without a record, plus whatever symptom score you and your practitioner are using to judge progress.

Frequently asked questions