Neurotoxin Reconstitution Guide

The universal rules

Before diving into product-specific protocols, every neurotoxin shares the same fundamental reconstitution principles. These apply to Botox, Dysport, Xeomin, Jeuveau, Daxxify, and Letybo equally.

1. 1
   Use preservative-free 0.9% Sodium Chloride Injection, USP. This is what every FDA prescribing information document specifies.
2. 2
   Inject the saline slowly down the inside wall of the vial. Never squirt it directly onto the powder — this can cause foaming and denaturation.
3. 3
   Gently swirl or rotate the vial to dissolve. NEVER shake. Shaking denatures the botulinum toxin protein and reduces effectiveness.
4. 4
   Check for vacuum when piercing the stopper. If there's no vacuum, the seal is compromised — discard the vial.
5. 5
   Inspect the solution. It should be clear, colorless, and free of particulate matter. If it's cloudy or has particles, discard it.
6. 6
   Label immediately. Every reconstituted vial must be labeled with: product name, concentration, date and time of reconstitution, and expiration (24 hours from reconstitution).
7. 7
   Use within 24 hours. All six products have a 24-hour use window after reconstitution. No exceptions.
8. 8
   Single-patient use only. All vials are single-patient use. Discard unused portions.

Product-by-product reconstitution protocols

Botox (onabotulinumtoxinA) — Allergan/AbbVie

Botox is available in 50-unit and 100-unit vials. The most common reconstitution in clinical practice is 2.0–2.5mL of saline per 100-unit vial.

Dysport (abobotulinumtoxinA) — Galderma

Dysport comes in larger vial sizes (300-unit and 500-unit) and uses a different unit scale than Botox. The clinical consensus conversion is approximately 2.5–3 Dysport units per 1 Botox unit, though the FDA states units are not interchangeable between products.

Xeomin (incobotulinumtoxinA) — Merz

Xeomin is known as the 'naked' neurotoxin because it contains no complexing proteins — just the active botulinum toxin. This theoretically reduces the risk of antibody formation over time. Available in 50-unit and 100-unit vials.

Jeuveau (prabotulinumtoxinA-xvfs) — Evolus

Jeuveau, marketed as #NEWTOX, was purpose-built for aesthetic use rather than repurposed from therapeutic applications. It's often positioned as a value-priced alternative with comparable clinical performance. Available in 100-unit vials.

Storage: Refrigerate at 2-8°C. Use within 24 hours after reconstitution.

Daxxify (daxibotulinumtoxinA-lanm) — Revance

Daxxify is the longest-lasting neurotoxin on the market, with results lasting 6–9 months compared to 3–4 months for other products. It uses a novel peptide stabilizer instead of human albumin. The FDA-approved dilution uses significantly less saline than other neurotoxins.

Letybo (letibotulinumtoxinA-jcdb) — Hugel/Evolus

Letybo is the newest FDA-approved neurotoxin (2024). It features high purity and a low protein load. Distributed in the US by Evolus (the same company behind Jeuveau). Available in 50-unit and 100-unit vials.

Storage: Refrigerate at 2-8°C. Use within 24 hours after reconstitution.

Quick comparison: All 6 products at a glance

Common reconstitution mistakes that cost you product

These are the errors that lead to wasted vials, inconsistent dosing, and lost revenue. Every one of them is preventable.

1. 1
   Shaking the vial. This denatures the botulinum toxin protein. Always gently swirl. If someone on your team shakes vials, retrain them immediately.
2. 2
   Squirting saline directly onto the powder. Inject slowly down the inside wall of the vial. Direct impact on the powder can cause foaming and protein damage.
3. 3
   Ignoring the vacuum check. No vacuum when you pierce the stopper means the seal is compromised. Discard it. Using a compromised vial risks contamination and reduced efficacy.
4. 4
   Not labeling reconstituted vials. An unlabeled vial is a liability. You don't know what product it is, what concentration it's at, or when it expires. Label every vial with product name, concentration, reconstitution time, and 24-hour expiration.
5. 5
   Using reconstituted product after 24 hours. All six products have a 24-hour window. No exceptions, no "it's probably fine." Track reconstitution times and discard expired product.
6. 6
   Mixing up products. When multiple neurotoxins are reconstituted simultaneously, the vials and syringes can look identical. Use color-coded needle caps, labeled syringes, and separate prep areas per product.

Bacteriostatic vs. preservative-free saline

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Frequently asked questions