At a glance
| Concentration | 2.4 mg is | Mark on U-100, 1 mL |
|---|---|---|
| 1 mg/mL | 2.4 mL | does not fit (over 1 mL) |
| 2 mg/mL | 1.2 mL | does not fit (over 1 mL) |
| 2.5 mg/mL | 0.96 mL | 96 |
| 5 mg/mL | 0.48 mL | 48 |
| 10 mg/mL | 0.24 mL | 24 |
Arithmetic at the concentrations shown. The concentration on your own label is the one that counts; enter it in the calculator.
Why the answer depends on the pharmacy label
2.4 mg is the top Wegovy strength. In a vial it is 96 units at 2.5 mg/mL, 48 units at 5 mg/mL and 24 units at 10 mg/mL. At 1 or 2 mg/mL it is more than a 1 mL syringe holds. This is where concentration and syringe collide most often. A pharmacy that dispensed 2.5 mg/mL for the low strengths may still be dispensing it at 2.4 mg, and 96 units is nearly the entire 1 mL barrel: readable, but with no margin, and impossible on a 0.5 mL syringe. Higher concentrations make the draw smaller and easier, which is one reason concentrations differ between pharmacies and between fills from the same pharmacy. Read the mg/mL on each new vial rather than assuming it matches the last one.
The mistake to watch for. A new vial from the same pharmacy can carry a different concentration from the last. If the mark you were used to suddenly holds a different number of milligrams, the label changed, not the arithmetic. Check the mg/mL on every fill.