GLP-1 Dose Tracking: Titration Logs Without Guessing the Syringe

Your GLP-1 prescription is written in milligrams. Your syringe is marked in units, which measure liquid. The two are connected only by the concentration of the vial in your hand, so when a refill arrives at a different concentration, the same prescribed dose becomes a different number of units. Log the milligrams, the concentration, and the units together, and the record survives the change.

This guide is about record keeping and unit conversion. What dose to take, when to change it, and what to do about a missed one are decisions for your prescriber and the product labeling.

What titration means

Titration is the practice of starting a medication at a low dose and stepping it up on a schedule. Approved GLP-1 products are labeled this way. The Wegovy prescribing information, for example, describes a starting dose held for four weeks before each planned increase, with the maintenance dose reached over several months. Each step is a new instruction with a start date.

A titration log therefore has two layers: the instructions, and what you did against them.

Milligrams are prescribed, units are drawn

A prescription specifies an amount of drug. A syringe measures an amount of liquid. Converting between them needs one more fact that appears on neither: how many milligrams are in each milliliter of your current supply.

The arithmetic is the same as any reconstitution conversion. Divide the dose in milligrams by the concentration in mg/mL to get milliliters, then multiply by 100 to read that volume on a U-100 syringe. The reconstitution math guide walks through each step.

If your clinician set 1 mg and your supply is 2.5 mg/mL, that is 1 ÷ 2.5 = 0.4 mL, or 40 units. If the supply is 5 mg/mL, the same 1 mg is 0.2 mL, or 20 units. Both draws deliver the prescribed dose. Only one matches what you did last month.

A refill can change the number on the syringe

Concentration is a property of the container you received, and it can change between fills. Here is one prescribed dose across four concentrations.

Nothing about the prescription changed across those rows. If you draw from memory instead of from the label, a concentration change becomes a dosing error in either direction, and the log will show a comfortingly steady unit count the whole time.

Two habits handle this. Read the concentration off the label of each new container and enter it before the first dose from it. And treat any sudden change in your usual unit count as a reason to call the pharmacy, not as rounding.

FDA's 2025 notice on unapproved and compounded GLP-1 products describes dosing errors traced to differences in concentration and in how patients were told to measure doses. Whatever the source of your supply, the lesson is the same: concentration belongs to the container, and it belongs in your record.

Pens and vials hide different things

A pen dials a dose and does the conversion internally, which removes the arithmetic and the syringe-reading error. It does not record history. A pen cannot tell you which day you injected, whether you skipped a week, or which pen a given dose came from.

A vial and syringe expose the conversion, which means you own it. That is more work and more room for error, and it is also more information, because you can see exactly how much liquid you delivered.

Either way, the log's job is the part the device does not do.

The two layers of a titration log

Record the dose your clinician set, the date that instruction took effect, and who set it. Then record each administration against that instruction.

1. Instruction layer. Dose in milligrams, start date, prescriber, and any note about the planned review point. One row per change.
2. Administration layer. Date and time, concentration of the container used, volume or units drawn, site, and notes. One row per injection.

That separation answers a question a single flat list cannot: were the injections consistent with the instruction? In a spreadsheet of milligrams, "my clinician increased the dose" and "I drew more than intended" look identical.

Keep the instruction layer sourced. If a change came from a portal message or an appointment, note that. When someone reviews the record later, where a dose change came from matters as much as the number.

Vitadel Protocol has a titration plan mode where you enter each step's dose and how many weeks it lasts. The app then shows the draw for the current step and logs each dose against it, so the two layers stay linked without a second document.

Fields that make the log worth reading

Beyond dose and date, a few fields carry most of the signal at a follow-up appointment.

• Interval in days between administrations. The field most likely to drift without anyone noticing.
• Concentration of the container used. So unit counts across months can be compared.
• Site. For the same rotation reasons as any subcutaneous injection.
• Tolerability notes. Captured on the day, not reconstructed.
• Body weight or other measures your clinician asked for. On a consistent schedule.
• Anything that changed. New medications, illness, travel across time zones.

Missed, late, and partial doses

Log the event as it happened and let the labeling and your clinician govern the response. Instructions for a missed dose vary by product and are specific enough that a general rule would be wrong for some readers. The Wegovy label, for instance, gives different instructions depending on how many days have passed and how close the next dose is.

The record should capture the intended date, the real date if the dose was taken late, an explicit skip entry if it was not taken, and the reason. Illness, supply interruption, travel, and a clinician's instruction have different implications, and a blank row communicates none of them.

Partial administrations get the same treatment. If solution leaked at the site or a pen was interrupted, record your estimate and flag it. Do not round to the intended dose.

Side-effect notes belong next to the dose

Symptom notes are useful when they carry a timestamp and a dose context. Nausea reported "sometime after the increase" cannot be placed on a timeline. Nausea logged on the evening of a specific administration, at a known interval and concentration, can be.

Keep notes short: what, how bad in plain words, and how long after the dose. Recording appetite, digestive symptoms, hydration, and food intake alongside doses gives an appointment something concrete to work from, which is why the nutrition logging guide sits next to this one.

Bring the log to the appointment

Export a clean date range showing prescribed dose changes, actual administration dates, the concentrations used, and notes, in date order and free of personal shorthand. A clinician reading it for ninety seconds should see dose, dates, and any gaps without asking a follow-up question.