Path C: Dosage Calculation (CRITICAL STEP - HIGH RISK FOR ERROR)
danger
Accurate math is non-negotiable. A misplaced decimal can deliver ten or even one hundred times the intended dose and may be life-threatening.
- Double-check every number you write down.
- Confirm the result with a reputable online calculator.
- If anything is unclear, do not inject.
Step-by-Step Calculation
Understanding each part of the equation helps you catch errors before they reach the syringe.
1. Find the concentration of your mixed solution
You need:
- Total peptide in the vial (mg)
- Total BAC water added during Reconstitution (mL)
Formula
Concentration (mg/mL) = Total Peptide (mg) / BAC Water Added (mL)
Example
Vial contains 10 mg
BAC water added = 2 mL
Concentration = 10 mg / 2 mL = 5 mg/mL
Because 1 mg = 1000 mcg, 5 mg/mL equals 5000 mcg/mL.
2. Work out the volume (mL) for your target dose
Formula (mg)
Injection Volume (mL) = Desired Dose (mg) / Concentration (mg/mL)
Formula (mcg)
Injection Volume (mL) = Desired Dose (mcg) / Concentration (mcg/mL)
Example
Desired dose = 2.5 mg
Concentration = 5 mg/mL
Injection Volume = 2.5 mg / 5 mg/mL = 0.5 mL
(The same answer appears if you use micrograms.)
3. Convert mL to insulin-syringe Units
U-100 insulin syringes hold 100 Units per mL.
Formula
Injection Volume (Units) = Injection Volume (mL) × 100
Example
0.5 mL × 100 = 50 Units
Draw the solution to the 50-Unit mark on a standard U-100 syringe to deliver a 2.5 mg dose.
danger
Calculation mistakes are the primary danger in Path C. Verify each step, compare at least two methods, and never rely on memory alone.
When every number checks out, continue to Drawing & Injecting.