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Lithium therapy and its interactions.

Gin S Malhi^1,2,3, Erica Bell^1,2,3, Tim Outhred^1,2,3

¹Discipline of Psychiatry, Northern Clinical School, University of Sydney.

Australian Prescriber

|July 18, 2020

Summary

This summary is machine-generated.

Lithium is a key mood stabilizer, but drug interactions can affect its levels. Careful monitoring and dose adjustments are essential to maintain therapeutic lithium serum concentrations and prevent adverse effects.

Keywords:

bipolar disorder lithium mood disorders

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Area of Science:

Pharmacology
Nephrology
Psychiatry

Background:

Lithium is a highly effective mood stabilizer for mood disorders.
Concurrent medication use in patients on lithium therapy can lead to drug interactions.
Maintaining a specific lithium serum concentration (0.6-0.8 mmol/L) is crucial for efficacy and relapse prevention.

Purpose of the Study:

To highlight the potential for drug interactions with lithium therapy.
To emphasize the impact of certain medications on lithium clearance.
To advise on the importance of monitoring and adjusting lithium dosage.

Main Methods:

Review of existing literature on lithium pharmacokinetics and drug interactions.
Analysis of drug classes known to affect renal function and their impact on lithium.
Clinical considerations for managing lithium therapy in patients on concomitant medications.

Main Results:

Lithium clearance is significantly affected by drugs that alter renal function.
Commonly prescribed medications like ACE inhibitors, angiotensin receptor antagonists, diuretics, and NSAIDs can influence lithium levels.
These interactions pose a risk of sub-therapeutic or toxic lithium serum concentrations.

Conclusions:

Prescribers must be vigilant about potential drug interactions affecting lithium.
Regular monitoring of lithium serum concentration is necessary.
Adjusting lithium dosage based on renal function and concomitant medications is prudent to ensure safety and efficacy.