Intravenous Administration of Distilled Water
Distilled (solute-free) water should not be administered intravenously because it is hypotonic and can enter the bloodstream, causing intravascular hemolysis and circulatory overload. [1][2][3]
Water for injection is intended to be used for dissolving or diluting injectable drugs, not as an IV fluid to infuse into the circulation without formulation to isotonicity. [1]
Mechanism of Harm From Solute-Free Water
Solute-free water is hypotonic relative to blood, which promotes red blood cell swelling and intravascular hemolysis. [1][2]
Large inadvertent volumes of hypotonic water administered IV have been associated with serious patient harm, including death, if not adjusted to isotonicity. [1][4]
Indications for “Water” in Parenteral Therapy
Sterile water products are generally intended for sterile irrigation or as a solvent for preparing other injectable medications. [2][1]
Systemic administration requires an appropriate IV formulation with solutes to avoid hemolysis. [1]
Evidence of Clinical Adverse Events
Intravascular hemolysis has been described after intravenous injection of distilled water in clinical testing, with systemic symptoms and hemoglobinuria. [3]
Fatal intravascular hemolysis has been reported after systemic exposure to distilled water in a clinical context involving bladder irrigation, supporting the risk from distilled water entering circulation. [4]
Medication-Preparation Versus Fluid-Infusion Distinction
Water for injection may be used to dissolve or dilute injectable drugs when water is an appropriate solvent. [1]
Intravenous administration of water for injection without adjustment to isotonicity is contraindicated because of the risk of hemolysis. [1]
Immediate Safety Actions for Accidental IV Administration
Accidental IV administration of hypotonic “water” should be treated as a medication safety emergency, because hemolysis and downstream organ injury can occur. [1]
Urgent evaluation is indicated for suspected accidental IV distilled water exposure, including assessment for hemolysis and hemodynamic effects, with discontinuation of the fluid. [2][1]
Practical Clarification on “Distilled Water” Products
Water used for IV purposes should be sterile and packaged for parenteral drug preparation or IV use, not non-IV distilled water. [2]
Use of non-sterile or inappropriate water sources for systemic administration is unsafe. [2]
Bottom-Line Clinical Guidance
Distilled water should not be given intravenously. [1][2][4]
Only solute-correct parenteral fluids or appropriately formulated preparations intended for IV administration should be used. [1][2]