Peptide Academy · Recovery

VIP

Also known as Vasoactive Intestinal Peptide

Educational research summary, not medical advice. Many compounds here are not approved for human use. Talk to a licensed clinician before making any health decision.

The Peptide Academy is free to read. Members also get the research protocols for VIP, dose and vial tracking, and an AI Advisor with cited sources. Try it all free for 7 days, no card needed.

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What is VIP?

An endogenous 28-aa neuropeptide studied for inflammatory and CIRS-related conditions.

How it works

Agonizes VPAC1/VPAC2 receptors, producing vasodilation, smooth-muscle relaxation and broad anti-inflammatory cytokine modulation.

What it has been studied for

Supports immune system modulation
May reduce inflammation
Studied for circadian and pulmonary health

These are effects reported or investigated in research, much of it preclinical. They are not proven outcomes or health claims.

Published research

Used off-label in chronic inflammatory response syndrome protocols; small trials in pulmonary hypertension

Half-life

~2 minutes (very rapid clearance)

Cautions

Can drop blood pressure; requires clinical oversight in CIRS protocols.

Side effects & fixes

Common side effects

—Human side-effect data is limited or absent for this compound
—Injection-site redness, itching or soreness is the most commonly reported effect for injected research peptides

Histamine reactions

Possible at the injection site, as with most injected peptides.

Common fixes

Rotate injection sites (abdomen, thighs, upper arms) and stay at least an inch from the last spot.
Let the alcohol swab dry fully, let the solution reach room temperature, and inject slowly with a fresh needle.
A cold compress for 5–10 minutes eases a red or itchy welt; it should fade within a day.
For mild itching, redness or flushing, a non-drowsy over-the-counter antihistamine (such as cetirizine or loratadine) is commonly used — check with a pharmacist first, especially if you take other medicines.
Start low, change one thing at a time, and keep a log of how you feel.

Stop and get help

Any unexpected or severe symptom — stop and contact a doctor.
Stop and get emergency help for swelling of the face, lips, tongue or throat, trouble breathing, widespread hives, chest pain or fainting.

Basis: Limited data; general experience with injected peptides. Educational only, not medical advice.

Medication concerns

Theoretical: no human interaction studies

Blood pressure medicines, nitrates (nitroglycerin) and erectile dysfunction pills (sildenafil, tadalafil)
VIP widens blood vessels; combined with these it can drop blood pressure too far, causing dizziness or fainting.
Everything else you take, including supplements
Bring a full list of medicines and supplements to your pharmacist or clinician before starting.

Basis: No interaction studies; concerns follow from VIP's blood-vessel-widening effect. Educational only, not medical advice. Never stop or change a prescribed medicine without your prescriber.

Protocols & tracking are members-only

Members see the research protocols for VIP, plan schedules, track every dose and vial, and ask the AI Advisor questions with cited sources. Try every Researcher feature free for 7 days, no card needed.

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