Bacteriostatic Water for Injection, 30 mL is a sterile, non-pyrogenic preparation of water that contains a bacteriostatic agent, typically 0.9% benzyl alcohol, which inhibits the growth of bacteria. It’s intended for diluting or dissolving medications for intramuscular (IM), intravenous (IV), or subcutaneous injection.
Key Features:
- Volume: 30 mL (multi-dose vial)
- Contents: Sterile water with 0.9% benzyl alcohol (9 mg/mL) as a preservative
- Use: Reconstitution or dilution of medications
- Shelf Life (after opening): Up to 28 days, due to the presence of benzyl alcohol
- Packaging: Usually in a rubber-stoppered vial suitable for multiple entries with a sterile needle
Important Details:
| Property | Description |
|---|---|
| Bacteriostatic Agent | Benzyl alcohol |
| Purpose | Diluting/dissolving injectable medications |
| Not for | Neonatal use (risk of benzyl alcohol toxicity) |
| Route of Administration | Dependent on the medication being reconstituted (IV, IM, SC) |
| Storage | Store at room temperature; avoid freezing |
| Preservative-free version? | Yes – Sterile Water for Injection, used when benzyl alcohol is contraindicated (e.g., for infants or continuous infusions) |
Warnings and Precautions:
- Not for direct injection – must be used with compatible medications.
- Do not use in newborns – benzyl alcohol has been associated with fatal “gasping syndrome” in neonates.
- Discard after 28 days of first use, even if there is still liquid left, to avoid contamination.
Common Uses:
- Reconstitution of lyophilized (powdered) drugs like:
- Peptides
- Hormones (e.g., HCG, HGH)
- Antibiotics (e.g., ceftriaxone)
For related options on EasyRxDrug, readers can browse the online pharmacy product catalog. For additional general safety context, review FDA guidance on buying and using medicine safely. This information is educational only and does not replace advice from a licensed clinician or pharmacist.



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I noticed improvement after few doses itself.
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Recommended for regular use as prescribed.
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Genuine medicine, packaging was proper and delivery was on time.
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Quality and effectiveness both are good.
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Helped me recover faster and improved my health.
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Works well with no side effects for me.
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This medicine worked better than I expected.