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Multiple-dose sodium polystyrene sulfonate in lithium intoxication: an animal model
J G Linakis1, M S Eisenberg, P G Lacouture
1Program in Clinical Pharmacology/Toxicology, Children's Hospital, Harvard University, Boston, MA.
Pharmacology & Toxicology
|January 1, 1992
Summary
Sodium polystyrene sulfonate (SPS) effectively lowers serum lithium levels in mice through repetitive dosing, with a dose-dependent effect observed. This study indicates SPS enhances lithium elimination, suggesting its potential therapeutic utility.
Area of Science:
- Pharmacology
- Toxicology
- Nephrology
Background:
- Previous research established sodium polystyrene sulfonate's (SPS) efficacy in reducing serum lithium (Li) after a single dose.
- Lithium toxicity remains a clinical concern, necessitating effective management strategies.
Purpose of the Study:
- To evaluate the effectiveness of repetitive sodium polystyrene sulfonate (SPS) dosing on serum lithium concentrations.
- To determine if the hypolithemic effect of SPS is dose-dependent.
- To investigate whether SPS enhances lithium elimination from the body.
Main Methods:
- A mouse model (N=144) was used, administering oral lithium chloride (LiCl).
- Mice received either water (control) or varying doses of SPS (2.5 g/kg or 5 g/kg) at multiple time points post-LiCl administration.
- Serum lithium concentrations were analyzed at 1, 2, 4, and 8 hours after treatment.
Main Results:
- SPS significantly reduced serum lithium concentrations compared to controls.
- The hypolithemic effect of SPS was found to be dose-related.
- Repetitive dosing of SPS appeared to accelerate lithium elimination.
Conclusions:
- Repetitive administration of sodium polystyrene sulfonate (SPS) is effective in lowering serum lithium levels.
- The observed reduction in lithium concentration is dose-dependent.
- SPS demonstrates potential for enhancing lithium elimination, warranting further investigation.