Safety
Units vs milligrams: a safety-first breakdown
For injectable GLP-1 safety, the rule is: dose in milligrams, never in bare 'units.' A unit is 0.01 mL of volume; the milligrams it delivers depend en
For injectable GLP-1 safety, the rule is: dose in milligrams, never in bare 'units.' A unit is 0.01 mL of volume; the milligrams it delivers depend entirely on the solution's concentration, which varies for compounded products. Confirm mg/mL with the pharmacy before interpreting any instruction.
What you need to know
This page exists because unit/milligram confusion is a leading cause of GLP-1 dosing harm, and it deserves a safety-specific treatment separate from the general explainer. The core fact is simple: 'units' describe how much liquid, not how much drug.
Concretely, 50 units of a 2.5 mg/mL solution is a different dose than 50 units of a 5 mg/mL solution — double, in fact. If a provider gives instructions in units without stating the concentration, that instruction is incomplete and unsafe to follow.
The safety fix is procedural: get the concentration in mg/mL, get your dose in milligrams from your prescriber, and let those two numbers define the volume for your specific product. This site publishes no unit converter precisely because a generic one would be wrong across concentrations.
| Volume drawn | At 2.5 mg/mL | At 5 mg/mL |
|---|---|---|
| 25 units (0.25 mL) | 0.625 mg | 1.25 mg |
| 50 units (0.50 mL) | 1.25 mg | 2.5 mg |
| Same mark | different dose | different dose |
- Get the concentration (mg/mL) for your exact vial
- Get your dose in milligrams from your prescriber
- Never translate someone else's units to your product
- Recheck if the concentration changes on a refill
What the evidence shows
- This guidance reflects FDA compounding information, USP standards, and state board of pharmacy resources.
- Verification steps here are public and checkable.
What the evidence does not show
- That following these steps makes a compounded product FDA-approved — it does not.
- That this page replaces personalized medical or pharmacist advice.
Frequently asked questions
Are units the same as milligrams?
No — units are volume; mg depend on concentration.
Why won't you give a converter?
A generic converter would be wrong for any product at a different concentration and could cause an error.
Related: pharmacy verification hub · safety hub · cost calculator. Compounded medications are not FDA approved.
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.