Lithium effect on temperature rhythm in psychiatric patients.

Area of Science:

• Physiology
• Pharmacology
• Psychiatry

Background:

• The diurnal rhythm of oral temperature is a fundamental physiological process.
• Lithium is a common mood stabilizer used in psychiatric treatment.
• Understanding lithium's physiological effects is crucial for patient management.

Purpose of the Study:

• To investigate the impact of lithium treatment on the diurnal rhythm of oral temperature.
• To compare temperature patterns in lithium-treated patients, other psychiatric patients, and healthy controls.
• To explore the relationship between lithium dosage timing and temperature fluctuations.

Main Methods:

• Studied oral temperature diurnal rhythms in 55 lithium-treated patients, 51 other psychiatric patients, and 58 healthy subjects.
• Monitored temperature over a 24-hour period.
• Assessed temperature changes following a 12-hour postponement of lithium intake.

Main Results:

• Lithium-treated patients exhibited higher oral temperatures compared to healthy controls throughout the 24-hour period.
• The temperature maximum in lithium-treated patients was observed to occur earlier.
• Postponing lithium intake temporarily normalized temperatures, which then rose again after the dose.

Conclusions:

• Lithium treatment significantly affects the diurnal rhythm of oral temperature.
• The observed temperature changes are potentially linked to lithium-induced alterations in electrolyte metabolism.
• Findings suggest careful consideration of lithium's chronobiological effects in psychiatric care.