Water
Water (sterile water for injection, irrigation, or inhalation) serves as the universal pharmaceutical solvent, vehicle, and excipient in virtually all injectable medications, oral solutions, topical formulations, and medical device applications. In medical use, sterile water is used for reconstitution of lyophilized drugs, as a hypotonic irrigant in surgical procedures, and as a carrier for inhalation therapies. Physiologically, water maintains osmotic balance, facilitates metabolic reactions, and is essential for cellular homeostasis.
Molecular Weight
18.0150 g/mol
LogP
-0.50
TPSA
1.00 Ų
Lipinski RO5
Pass
Therapeutic Areas
Mechanism of Action
Applied directly to the skin or mucous membranes, where it exerts its therapeutic effect locally at the site of application with minimal systemic absorption.
Pharmacokinetics (PK)
Pharmacodynamics (PD)
Applied directly to the skin or mucous membranes, where it exerts its therapeutic effect locally at the site of application with minimal systemic absorption.
2D Structure
Cite this structure
Embed this structure
SMILES
O
InChI
InChI=1S/H2O/h1H2
Molecular Formula
H2O
HBD / HBA
1 / 1
Rotatable Bonds
0
Heavy Atoms
1
No targets recorded
Target interaction data is not yet available for this drug.
No interactions recorded
Drug interaction data is not yet available for this compound.
No side effects recorded
Side effect data is not yet available for this drug.
Frequently Asked Questions
Water (sterile water for injection, irrigation, or inhalation) serves as the universal pharmaceutical solvent, vehicle, and excipient in virtually all injectable medications, oral solutions, topical formulations, and medical device applications. In medical use, sterile water is used for reconstitution of lyophilized drugs, as a hypotonic irrigant in surgical procedures, and as a carrier for inhalation therapies. Physiologically, water maintains osmotic balance, facilitates metabolic reactions, and is essential for cellular homeostasis.
Applied directly to the skin or mucous membranes, where it exerts its therapeutic effect locally at the site of application with minimal systemic absorption.
Yes, Water is an approved drug. It has reached clinical phase 4. It is classified as a Small molecule.
References & Data Sources
- ChEMBL — European Bioinformatics Institute (EBI). CHEMBL1098659. Open-access bioactivity database.
- PubChem — National Center for Biotechnology Information (NCBI). CID 962. Chemical information database.
Data aggregated from publicly available pharmacological databases. Last updated 2026-03-28.
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