Aseptic technique

Last updated August 2026

The practice of keeping everything sterile while reconstituting and drawing — wiping stoppers with alcohol, not touching needle tips — to avoid contaminating the vial.

The practical routine is simple but easy to shortcut: swab the vial stopper and let the alcohol dry, keep the needle from touching skin, fingers, or countertops, and recap between draws. Because bacteriostatic water only inhibits growth rather than sterilizing, contamination introduced during a draw can still persist. Careful technique is what lets a multi-dose vial stay usable across the weeks the calculator assumes.

Educational reference only — not medical advice. Always follow the guidance of a qualified healthcare professional.