Mixing and storage

Add 1 mL of bacteriostatic water to a 5 mg vial, which gives 5 mg in each mL, so 1.6 mg is 32 units. For a 10 mg vial, add 2 mL for the same strength. Run the water down the side and swirl, never shake. Keep powder cool and dark, and keep mixed vials in the fridge and use them within 28 days.