Analysis
Units vs milligrams: the GLP-1 dosing trap
With injectable GLP-1, 'units' on a syringe measure volume, not drug. The milligrams delivered depend on the product's concentration, which varies for
With injectable GLP-1, 'units' on a syringe measure volume, not drug. The milligrams delivered depend on the product's concentration, which varies for compounded drugs. The same number of units can be very different doses — a leading cause of accidental over- or under-dosing.
The full picture
An insulin-syringe 'unit' is 0.01 mL of liquid. How much drug that liquid contains depends entirely on the solution's concentration (mg per mL). Two compounded vials at different concentrations deliver different milligrams at the same syringe mark. So a dose expressed only in 'units' is ambiguous without the concentration.
This is exactly why reputable sources — including this one — refuse to publish a universal unit-to-milligram converter. A generic converter would be wrong for any product at a different concentration, and a wrong dose here isn't a rounding error; it's a safety event.
The fix is to work in milligrams. Ask the pharmacy for the concentration and your intended dose in milligrams, and let your prescriber translate that to your specific product. Never reuse someone else's 'units.'
Frequently asked questions
Are units the same as mg?
No. Units are volume; mg depend on concentration, which varies for compounded products.
Why won't sites give a unit converter?
Because it would be wrong across concentrations and could cause a dosing error.
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Not medical advice. This page is consumer education, not medical advice, and does not recommend a dose, product, or provider. Compounded medications are not FDA approved. Talk with a licensed clinician about your situation.