Elliotts B Solution provides a buffered salt solution for use as a diluent for the intrathecal administration of methotrexate sodium and cytarabine. It has been demonstrated that Elliotts B Solution is comparable to cerebrospinal fluid in pH, electrolyte composition, glucose content, and osmolarity:

Comparison of Electrolyte Composition, pH and Nonelectrolytic Constituents of Elliotts B Solution and CSF

The approximate buffer capacity of Elliotts B Solution is 1.1 X 10-2 equivalents when the challenge solution is 0.01 N HCl and 7.8 X 10-3 equivalents when the challenge solution is 0.01 N NaOH.1

Compatibility studies with methotrexate sodium and cytarabine indicate these drugs are physically compatible with Elliotts B Solution.