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Neuroreport|December 20, 1994
The CCK-B receptor antagonist Cl 988 reverses tolerance to morphine in ratsO Hoffmann, Z Wiesenfeld-HallinNeuroreport|February 29, 1996
Dextromethorphan potentiates morphine antinociception, but does not reverse tolerance in ratsO Hoffmann, Z Wiesenfeld-HallinBrain Research|September 18, 1998
Genetic differences in morphine sensitivity, tolerance and withdrawal in ratsO Hoffmann, A Plesan, Z Wiesenfeld-HallinNeuropeptides|April 1, 1996
L-740,093, a new antagonist of the CCK-B receptor, potentiates the antinociceptive effect of morphine: electrophysiological and behavioural studiesX J Xu, O Hoffmann, Z Wiesenfeld-HallinNeuroscience Letters|April 28, 1999
Genetic differences in the antinociceptive effect of morphine and its potentiation by dextromethorphan in ratsA Plesan, O Hoffmann, X J Xu, et al.Acta Physiologica Scandinavica|November 1, 1996
N-methyl-D-aspartate receptor antagonists potentiate morphine's antinociceptive effect in the ratS Grass, O Hoffmann, X J Xu, et al.Brain Research|March 5, 1999
Extracellular cholecystokinin levels in the rat spinal cord following chronic morphine exposure: an in vivo microdialysis studyG A Lucas, O Hoffmann, P Alster, et al.Acta Physiologica Scandinavica|July 1, 1987
Intrathecal noradrenaline has a dose-dependent inhibitory or facilitatory effect on the flexion reflex in the ratZ Wiesenfeld-HallinNeuroscience Letters|November 20, 1985
Intrathecal somatostatin modulates spinal sensory and reflex mechanisms: behavioral and electrophysiological studies in the ratZ Wiesenfeld-HallinBrain Research|April 30, 1986
Substance P and somatostatin modulate spinal cord excitability via physiologically different sensory pathwaysZ Wiesenfeld-HallinPageof 37