At a glance
| Concentration | 1.7 mg is | Mark on U-100, 1 mL |
|---|---|---|
| 1 mg/mL | 1.7 mL | does not fit (over 1 mL) |
| 2 mg/mL | 0.85 mL | 85 |
| 2.5 mg/mL | 0.68 mL | 68 |
| 5 mg/mL | 0.34 mL | 34 |
| 10 mg/mL | 0.17 mL | 17 |
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
1.7 mg is a Wegovy strength that exists because of the pen's fixed steps, and it produces awkward numbers in a vial: 68 units at 2.5 mg/mL, 34 units at 5 mg/mL, 17 units at 10 mg/mL, and a full 1 mL syringe plus 70 units more at 1 mg/mL, which does not fit. That last case is the one to watch. At 1 mg/mL, 1.7 mg is 1.7 mL and no insulin syringe holds it; the calculator refuses the draw and names the syringes that would fit, which for this volume is none of the insulin sizes. Drawing twice is not an answer the label gives. At 2 mg/mL it is 0.85 mL, the 85 mark, which fits a 1 mL syringe but not the smaller ones. Whether 1.7 mg is a sensible dose from your vial is therefore partly a question of what concentration the pharmacy chose.
The mistake to watch for. Never draw a dose in two syringes because the first was full. If the volume does not fit, the concentration or the syringe is wrong for the dose, and that is a pharmacy conversation.