Are peptide vials over 100ml allowed?

Yes, under the TSA medical exemption. Declare them separately at the checkpoint. There is no volume limit for medically necessary liquids.

What counts as a medical liquid?

Any liquid medication you need for your health condition. This includes peptide vials, bacteriostatic water, reconstituted solutions, and insulin.

Do ice packs count as liquids?

Yes. Ice packs must be frozen solid at the TSA checkpoint. Partially melted gel packs may be confiscated. Medical-use ice packs declared with medication are given more leeway.

TSA & Security

February 12, 2026 · 4 minutes read

Peptide 3-1-1 Rule: Medical Exemption Explained

Medical liquids over 3.4oz are TSA-allowed. How to use the medical exemption for peptide vials and ice packs legally.

What Is the TSA 3-1-1 Rule and Why Peptides Are Exempt

The 3-1-1 rule limits liquids to 3.4oz containers in a single 1-quart bag. Medical liquids are explicitly exempt. Peptide vials, bacteriostatic water, and reconstituted solutions qualify as medical liquids when declared at the checkpoint.

How to Declare Medical Liquids

Remove your medical liquids bag from your carry-on before placing it on the belt. Tell the officer: "I have medical liquids that need separate screening." They will visually inspect or swab the containers.

Ice Pack Rules — Must Be Frozen Solid

TSA requires ice packs to be frozen solid at the checkpoint. Partially melted gel packs are treated as liquids. Pre-freeze your packs the night before and pack them last, right before leaving for the airport.

How to Pack 10+ Vials Legally

Use a clear bag large enough for all vials. Arrange them label-forward so agents can read compound names without handling each vial. Include your physician letter at the top of the bag.

What to Do If an Officer Says No — Escalation Steps

1. Calmly reference the TSA medical exemption policy. 2. Ask to speak with a supervisor. 3. Request the TSA Cares helpline number (855-787-2227). You have the right to carry medically necessary liquids.

Need emergency resources?

If your peptides were confiscated, compromised, or you need emergency contacts — visit the SOS Registry.

Peptide Travel Editorial Team

Independent researchers and performance travelers with firsthand experience navigating customs across 30+ countries. Our guides are written from direct travel experience and cross-referenced against official customs and regulatory sources.

This content is reviewed quarterly and updated when regulations change. Last reviewed: May 2026

Not medical advice. Always consult your physician before traveling with any pharmaceutical compounds. Verify all regulations with official government sources.

Last updated: May 2026
Not medical advice. Always consult your physician and verify regulations with official customs authorities.

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