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Updated: May 23, 2026
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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
Published on: October 16, 2013
Active emergence from propofol general anesthesia is induced by methylphenidate
Jessica J Chemali1, Christa J Van Dort, Emery N Brown
1Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
Anesthesiology
|March 27, 2012
Summary
Methylphenidate significantly shortens emergence time from propofol anesthesia in rats. This stimulant drug also effectively induced arousal during continuous propofol infusion, suggesting potential clinical applications.
Area of Science:
- Anesthesiology
- Neuroscience
- Pharmacology
Background:
- General anesthetics like propofol and isoflurane have distinct mechanisms.
- Previous research indicated methylphenidate aids emergence from isoflurane anesthesia.
Purpose of the Study:
- To investigate if methylphenidate can actively induce emergence from propofol-induced general anesthesia.
- To test the hypothesis that methylphenidate's pro-emergence effects extend to propofol.
Main Methods:
- Adult rats received single-dose or continuous target-controlled infusion (TCI) of propofol.
- Methylphenidate's effect on emergence time and righting reflex restoration was assessed.
- Electroencephalogram (EEG) spectral analysis was performed during propofol TCI before and after methylphenidate.
Main Results:
- Methylphenidate significantly reduced median emergence time from propofol (735s to 448s, P=0.0051).
- During continuous propofol infusion, methylphenidate rapidly restored righting reflex in all rats (median 82s).
- EEG analysis showed a shift from delta to theta and beta waves post-methylphenidate, indicating arousal.
Conclusions:
- Methylphenidate effectively decreases emergence time from single-dose propofol.
- Methylphenidate induces arousal and restores righting reflex during continuous propofol anesthesia in rats.
- Further human studies are needed to confirm methylphenidate's efficacy in propofol emergence.
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