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Lidocaine and Amitriptyline Interaction during Experimental Haemoperfusion

Department of Anaesthesiology, Linköpings University Hospital, Linköping, Sweden

B. Löfström

Department of Anaesthesiology, Linköpings University Hospital, Linköping, Sweden

E. MÅrtensson

Department of Anaesthesiology, Linköpings University Hospital, Linköping, Sweden

1 Displacement of amitriptyline by lidocaine was studied during haemoperfusion (HP) in five beagle dogs.

2 Clearance of amitriptyline during HP was 0.93, although the amount of amitriptyline removed was only 2% of the given dose. Lidocaine does therefore not improve amitriptyline yield during HP. Clearance of lidocaine during HP was 0.99. Almost 13% of the lidocaine given intravenously was removed by HP.

3 Lidocaine did not improve myocardial performance during HP in amitriptyline-intoxicated dogs.

4 At necropsy the highest concentrations of amitriptyline in this model were found in the brain and the lung. The amitriptyline/nortriptyline ratio was lowest in the liver and lung, suggesting that these two organs are major sites of metabolism.

Human & Experimental Toxicology, Vol. 3, No. 3, 165-171 (1984)
DOI: 10.1177/096032718400300302


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