water for injection at a glance
Medicine class
Solvent and diluting agent for parenteral preparations
Usual role
Reconstitutes or dilutes compatible injectable medicines
Key safety point
Must not be injected or infused alone because it is hypotonic and may cause haemolysis
What is water for injection used for?
Its licensed role is as a solvent for suitable medicines intended for parenteral administration.
Dissolving a compatible powdered injectable medicine
Diluting a compatible medicine before injection or infusion
How does water for injection work?
It has no intended therapeutic action of its own. It provides a sterile aqueous vehicle for dissolving or diluting another medicine; the added medicine determines the clinical effects and pharmacokinetics.
How to take water for injection
It is not swallowed or administered alone. A healthcare professional uses it to prepare a compatible injectable medicine. Use only clear solution without visible particles and maintain aseptic technique.
Confirm that it is an approved diluent for the medicine being prepared.
Inspect the solution and container before use.
Follow the added medicine’s compatibility, preparation and administration instructions.
water for injection side effects
Common or expected effects
- No common adverse effects are specified when it is used correctly; effects may instead arise from the added medicine.
Get urgent medical advice
- Haemolysis may occur if it is administered alone.
- Large volumes of a hypotonic preparation made with it may cause haemolysis.
water for injection in pregnancy
Pregnancy risk is determined by the medicine added to it. Check that medicine’s suitability before administration.
water for injection while breastfeeding
Breastfeeding considerations depend on the medicine dissolved or diluted. Check the added medicine’s product information and seek prescriber or pharmacist advice when necessary.
water for injection interactions
It has no listed direct pharmacological interactions, but medicines mixed with it may interact or be incompatible.
Any added injectable medicine
Confirm that water for injection is a suitable diluent and consider interactions or incompatibilities involving every medicine in the preparation.
Common questions about water for injection
Answers are fully visible for fast scanning and source review.
What is water for injection used for?
It dissolves or dilutes suitable medicines for administration by injection or infusion.
Can it be injected on its own?
No. It is hypotonic and may damage red blood cells if administered alone.
Does it contain excipients?
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.