Venlafaxine refractory

Given the use of venlafaxine for treatment-refractory depression in adults, it is likely that it will be used for similar purposes in children. In addition, it is likely that venlafaxine will be used for childhood anxiety disorders. It is unclear whether venlafaxine is serotonergi-cally powerful enough to be useful in OCD. The lack of significant drug-drug interactions may facilitate its use in patients for whom antidepressant medication combinations are anticipated. 

Although the efficacy of tricyclic antidepressants in the treatment of unipolar depression is beyond reproach, the side-effect profile of these agents makes them less desirable as first-line therapeutic agents. Introduction of selective serotonin reuptake inhibitors (SSRIs) such as fluoxetine, paroxetine, sertraline, citalopram and fluvoxamine in the past decade has revolutionized the treatment of depression universally. The side-effect profile of SSRIs, such as nausea, diarrhea and sexual dysfunction, is considerably more benign than that of tricyclic drugs. Multiple controlled trials have proven the efficacy of SSRIs vs. placebo (Nemeroff, 1994). Recently, a number of SNRIs (serotonin and noradrenaline reuptake inhibitors) and so-called atypical antidepressants have been marketed that may have additional advantages over SSRIs, such as more rapid onset of action (venlafaxine. mirtazapine) and low sexual side-effect potential ( bupropion, nefazodone). Additionally, it appears that venlafaxine may be more efficacious in cases of treatment-refractory depression (Clerc et al., 1994 Fatemi et al., 1999). Finally, in a recent report (Thase et al., 2001),... 

MAOIs, TCAs, lithium, clomipramine (alone or with topical steroids), fluoxetine, and fluvoxamine may reduce the frequency and intensity of this disorder ( 210, 226, 255, 256, 257, 258, 259, 260 and 261) however, controlled trials are needed to conclusively establish efficacy. Relapse after initial improvement has also been reported, however. Data also indicate that both trichotillomania and OCD may respond to venlafaxine ( 262, 263). For children, such treatments should be reserved for only those with the more severe, refractory forms. 

Other Serotonergic Antidepressants In recent years, new antidepressants with serotonergic actions have also been shown to benefit patients with chronic PTSD, many of whom had been treatment refractory. These drugs include venlafaxine (278), mirtazapine (279), and nefazodone (280). 

Venlafaxine inhibits the re-uptake of both serotonin and noradrenaline. Trials have shown efficacy comparable to that of tricyclic antidepressants, and it may be particularly effective in refractory depression (1)(2). 

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