Bacteriostatic Water

Bacteriostatic Water 0.9% by Dragon Pharma

Dragon Pharma Bacteriostatic Water is sterile water for injection containing 0.9% benzyl alcohol (BnOH) as a preservative — the standard pharmaceutical diluent for reconstituting lyophilised peptides and hormones. It is the correct and only appropriate diluent for all Dragon Pharma peptide vials, including HGH, BPC-157, TB-500, Ipamorelin, CJC-1295, Tesamorelin and all other lyophilised products in the range.

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Bacteriostatic Water vs Sterile Water — Why the Difference Matters

The distinction between bacteriostatic water and plain sterile water is clinically important and consistently misunderstood — a genuine information gap in competitor content:

The practical consequence: peptides reconstituted with plain sterile water must be used within 24 hours of reconstitution and the entire vial consumed in a single use — making it impractical for daily-dosed peptides like Ipamorelin or BPC-157 where the vial is accessed multiple times over weeks. Bacteriostatic water's 0.9% benzyl alcohol prevents bacterial proliferation between draws, making safe multi-dose use possible over up to 28 days.

What 0.9% Benzyl Alcohol Does — The Mechanism

Benzyl alcohol in bacteriostatic water is frequently described as a "preservative" without explanation of how it works — this is an important information gap:

• Benzyl alcohol is bacteriostatic, not bactericidal — it does not kill bacteria, it inhibits their reproduction by disrupting bacterial cell membrane permeability and interfering with cellular metabolism
• At 0.9% concentration, benzyl alcohol prevents bacteria that enter the vial during needle puncture from growing to contamination levels — they remain present at negligible numbers rather than proliferating
• The 0.9% concentration is a clinically established standard: sufficient to provide effective bacteriostasis while remaining within the toxicity threshold safe for repeated subcutaneous injection. Concentrations significantly above this would increase local tissue irritation; concentrations significantly below would be ineffective as a preservative
• Benzyl alcohol at 0.9% also acts as a mild local anaesthetic at the injection site — a secondary benefit that slightly reduces injection discomfort

How to Use Bacteriostatic Water for Reconstitution

Calculating Reconstitution Volume

The volume of bacteriostatic water used determines the concentration per unit drawn. For a 5mg peptide vial dosed at 200mcg per injection:

• Add 2.5ml bacteriostatic water → 200mcg per 0.1ml (10 units on a U-100 insulin syringe)
• Add 1ml bacteriostatic water → 500mcg per 0.1ml — more concentrated, smaller injection volumes
• Add 5ml bacteriostatic water → 100mcg per 0.1ml — less concentrated, easier to measure small doses

There is no single "correct" reconstitution volume — it is chosen based on desired dose per injection, syringe type, and personal preference for injection volume. The key is calculating dose per unit before drawing and remaining consistent across all draws from the same vial.