One of the most common questions regarding dilution of medications for injection is the contrasting of sterile water vs. bacteriostatic water. The short answer is that sterile water contains no additional preservatives. Bacteriostatic water, however, contains 0.9% benzyl alcohol as a preservative. In instances where this alcohol content can be detrimental, it is advised to utilize sterile water.
The most common reason one would select sterile water vs. bacteriostatic water is sensitivity. This condition relates to procedures involving particularly sensitive areas of the body, pregnant women, newborns, and unborn children. Additionally, bacteriostatic water is not recommended for fluid replacement.
Though there is little difference between the two, it is important to understand the differences when selecting sterile water vs. bacteriostatic water. Always follow medical direction when administering either and consult a pharmacist or care provider to answer any unresolved questions.
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