The short answer
Record the brand and manufacturer, the vial lot number and expiration date, the diluent and volume used, the reconstitution date and time, units delivered at each anatomical site, total units, needle gauge, and the treating clinician. Add an injection map. Lot documentation lets you trace patients if a product is recalled, and it is the evidence that separates legitimate supply from the counterfeit botulinum toxin the FDA and CDC warned about in 2024.
Why do lot numbers matter more than they used to?
In April 2024 the FDA alerted clinicians and consumers that counterfeit versions of Botox had been distributed in multiple states and injected into patients, and the CDC issued a parallel health alert after adverse events including hospitalizations, with symptoms consistent with botulism — blurred or double vision, dysphagia, dry mouth, weakness and difficulty holding the head up. The counterfeit cartons and vials were identified partly by lot number. In November 2025 the FDA issued warning letters to operators of websites illegally marketing unapproved and misbranded botulinum toxin products.
That is the practical case for lot documentation. If a product you injected is later identified as counterfeit, mishandled or recalled, the lot number is the only mechanism you have to identify which patients received it. Without it you cannot notify, and failure to notify is a far worse regulatory problem than the original supply error.
The second reason is provenance. Buying from an authorized distributor and recording lot numbers is the documentary record that shows you did not source from a grey-market importer — the fact pattern behind several federal prosecutions of med spa operators.
What belongs in the treatment record?
| Field | Detail to capture |
|---|---|
| Product | Brand and manufacturer — Botox, Dysport, Xeomin, Jeuveau, Daxxify are not interchangeable |
| Lot number | Exactly as printed on the vial, per vial used |
| Expiration date | From the vial |
| Diluent | Preservative-free or bacteriostatic saline, and volume added |
| Concentration | Resulting units per 0.1 mL |
| Reconstitution | Date and time reconstituted, and who reconstituted it |
| Dosing | Units per injection site and total units for the session |
| Sites | Named anatomical sites plus an injection map diagram |
| Technique | Needle gauge, depth, any topical or ice anesthesia |
| Provider | Name and license type of the person who injected |
| Order | Reference to the good-faith exam and the standing order or specific order relied on |
| Consent | Version and date of the consent signed that day |
Units are brand-specific and must never be converted casually between products in the chart. A record reading "40 units" without naming the brand is ambiguous, because the unit is defined by the manufacturer's own assay. The FDA-approved labeling for onabotulinumtoxinA states that units are not interchangeable with other botulinum toxin preparations.
What does storage and handling documentation add?
The approved labeling directs refrigerated storage and specifies handling after reconstitution. Keep a refrigerator temperature log with daily readings, an excursion log for any out-of-range event with the action taken, and a purchase record tying each lot to an invoice from an authorized distributor. If you discard a vial, log why.
Add an off-label line where relevant. Masseter, platysma, gummy smile, hyperhidrosis outside labeled indications and many neck and lower-face applications are off-label uses of an approved product. Off-label prescribing is lawful; documenting that the patient was told the use was off-label is what protects the consent.
What this means for your paperwork
Design the neurotoxin treatment note as a structured form rather than free text, so no field can be silently skipped: product, lot, expiry, diluent, concentration, reconstitution time, map, units per site, total units, provider, consent version. Free text notes are where lot numbers disappear.
Keep three supporting registers alongside the charts: a product receipt log linking invoice, lot and date received; a temperature log; and an adverse event log. Retain treatment records for at least your state's medical record retention period, which commonly runs seven to ten years for adults and longer for minors. When a recall or a board inquiry arrives, the question is how quickly you can produce every patient treated from a given lot — practices that can answer in an hour are in a fundamentally different position from those that cannot answer at all.
Related questions
This answer is educational and is not legal or medical advice. Requirements vary by state and change over time — verify with your own legal and clinical advisors before applying anything here in practice.