Calculators / Retatrutide dose charts
Retatrutide dose charts (mg → U-100 units)
Units to draw on a standard U-100 insulin syringe, for each common Retatrutide vial size and BAC-water volume. Doses shown reflect ranges reported in published research — they are reference points for the math, not recommendations. For other numbers, use the live calculator.
5 mg vial
| Dose | + 1 mL water (5 mg/mL) | + 2 mL water (2.5 mg/mL) | + 3 mL water (1.6666666666666667 mg/mL) |
|---|---|---|---|
| 1 mg | 20 u | 40 u | 60 u |
| 2 mg | 40 u | 80 u | > syringe |
| 4 mg | 80 u | > syringe | > syringe |
| 8 mg | > syringe | > syringe | > syringe |
| 12 mg | > syringe | > syringe | > syringe |
10 mg vial
| Dose | + 1 mL water (10 mg/mL) | + 2 mL water (5 mg/mL) | + 3 mL water (3.3333333333333335 mg/mL) |
|---|---|---|---|
| 1 mg | 10 u | 20 u | 30 u |
| 2 mg | 20 u | 40 u | 60 u |
| 4 mg | 40 u | 80 u | > syringe |
| 8 mg | 80 u | > syringe | > syringe |
| 12 mg | > syringe | > syringe | > syringe |
20 mg vial
| Dose | + 1 mL water (20 mg/mL) | + 2 mL water (10 mg/mL) | + 3 mL water (6.666666666666667 mg/mL) |
|---|---|---|---|
| 1 mg | 5 u | 10 u | 15 u |
| 2 mg | 10 u | 20 u | 30 u |
| 4 mg | 20 u | 40 u | 60 u |
| 8 mg | 40 u | 80 u | > syringe |
| 12 mg | 60 u | > syringe | > syringe |
30 mg vial
| Dose | + 1 mL water (30 mg/mL) | + 2 mL water (15 mg/mL) | + 3 mL water (10 mg/mL) |
|---|---|---|---|
| 1 mg | 3.3 u | 6.7 u | 10 u |
| 2 mg | 6.7 u | 13.3 u | 20 u |
| 4 mg | 13.3 u | 26.7 u | 40 u |
| 8 mg | 26.7 u | 53.3 u | 80 u |
| 12 mg | 40 u | 80 u | > syringe |
Formula: units = dose ÷ concentration × 100 · concentration = vial mg ÷ water mL · Retatrutide half-life ≈ 6 days (Retatrutide phase-2 pharmacokinetics (Jastreboff, NEJM 2023; half-life ≈6 days))
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