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Description
Water for injection (WFI) is a sterile, purified water product used in medical settings. It is intended for use in the preparation and dilution of medications for injection.
Its primary medical use is to serve as a solvent or diluent for injectable drugs, ensuring that the medication can be safely administered via intravenous, intramuscular, or subcutaneous routes.
Water for injection belongs to the drug class of pharmaceutical solvents or diluents.
The general mechanism of action is that it provides a sterile, non-pyrogenic medium that does not interfere with the drug’s activity, allowing the active ingredient to be delivered effectively into the body.
The common form is a sterile, clear liquid typically supplied in single-use ampoules or vials.
Dosage instructions depend entirely on the medication being prepared and should follow the specific guidelines for that medication. Water for injection itself is not administered alone but used only as directed for dilution or reconstitution.
Side effects are generally related to the medication with which it is used rather than the water itself. However, it must be sterile to avoid infection risks. Contraindications include use of non-sterile or contaminated water. Proper aseptic technique must be followed to prevent complications.
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