Leonora Pierce
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Acute effects of Bupropion ( Wellbutrin SR ) on extracellular foreign drug store dopamine concentrations in rat striatum bupropion and nucleus accumbens studied by in vivo microdialysis.This study examined the acute effects of the novel antidepressant drug, Bupropion ( Wellbutrin SR ), on extracellular concentrations of dopamine (DA), its metabolites, and the bupropion serotonin metabolite 5-HIAA in the striatum and nucleus accumbens using on-line microdialysis in freely moving rats. TCAs are associated with a number of adverse effects which are inconvenient for patients. types antidepressants pills Venlafaxine ( Effexor )--selective antidepressants serotonin and noradrenergic reuptake inhibitors (SNRI) was shown to be effective in the treatment of different kinds of pain. Duloxetine (SNRI) is effective in relieving both the emotional and painful physical symptoms of depression. Bupropion ( Wellbutrin SR topiramate generic problems ), a noradrenaline and dopamine-reuptake inhibitor antidepressants appears to be effective in the treatment of neuropathic pain. No placebo-controlled studies are available for noradrenergic and specific serotoninergic antidepressant (NaSSA)--Mirtazapine ( Remeron ) and noradrenaline reuptake inhibitor (NaRI)--reboxetine. The data regarding selective serotonin reuptake inhibitors (SSRI) are conflicting. Trazodone (a serotonin-reuptake inhibitor as well as a postsynaptic wellbutrin serotonin receptor antagonist) does not appear to be effective for the treatment of chronic pain. Additional randomized, controlled trials are necessary to fully evaluate the role of new antidepressants wellbutrin in the treatment of chronic pain. Bupropion ( Wellbutrin SR ) produced similar neurochemical responses in the striatum and the nucleus accumbens. The partial dissociation between DA release and stereotyped behavior suggests that the relationship between neurotransmitter release and behavior may be complex.. The increase in extracellular DA after Bupropion ( Wellbutrin SR ) (25 mg/kg) was blocked by tetrodotoxin and was therefore action-potential-dependent. These results suggest that increases in DA transmission contribute to the behavioral effects of Bupropion ( Wellbutrin SR ) and are consistent with a role for DA in the antidepressant effects of this drug. The efficacy of antidepressants in the treatment of chronic noncancer pain--a reviewAntidepressants are often applied in the treatment of chronic pain. The newer antidepressants have fewer side effects and equivalent efficacy on mood disorders. Analgesic action of tricyclic antidepressants (TCAs) has been extensively studied and proven. Bupropion ( Wellbutrin SR ) decreased DOPAC concentrations, increased 5-HIAA, and had variable effects on homovanillic acid (HVA) (decreases with 10 mg/kg and increases with 25 and 100 mg/kg). Bupropion ( Wellbutrin SR ) HCl (10, 25, and 100 mg/kg intraperitoneally) increased extracellular striatal DA in a dose- and time-dependent manner; 1 mg/kg did not affect extracellular DA. The maximal response occurred within the first 20 minutes ( 76%, 164%, and 443% for each dose, respectively) follo by a gradual decrease to a stable but elevated level for the next 2 hours. This neurochemical response was strongly associated with Bupropion ( Wellbutrin SR )-induced stereotyped behavior during the first hour but not during the subsequent 2 hours. This article reviews the available publications (mainly placebo-controlled trials) concerning the efficacy of these medications in the treatment of chronic pain.
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