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  • Title: Escitalopram : a review of its use in the management of major depressive and anxiety disorders.
    Author: Waugh J, Goa KL.
    Journal: CNS Drugs; 2003; 17(5):343-62. PubMed ID: 12665392.
    Abstract:
    UNLABELLED: Escitalopram is the therapeutically active S-enantiomer of RS-citalopram, a commonly prescribed SSRI. The R-enantiomer is essentially pharmacologically inactive. Escitalopram 10 or 20 mg/day produced significantly greater improvements in standard measurements of antidepressant effect (Montgomery-Asberg Depression Rating Scale [MADRS], Clinical Global Impressions Improvement and Severity scales [CGI-I and CGI-S] and Hamilton Rating Scale for Depression [HAM-D]) in patients with major depressive disorder (MDD) than placebo in several 8-week, placebo-controlled, randomised, double-blind, multicentre studies. Symptom improvement was rapid, with some parameters improving within 1-2 weeks of starting escitalopram treatment. In addition, escitalopram showed earlier and clearer separation from placebo than RS-citalopram, at one-quarter to half the dosage, in 8-week, placebo-controlled trials; had significantly better efficacy than RS-citalopram in a subgroup of patients with moderate MDD in a 24-week trial; and produced sustained response and remission significantly faster than venlafaxine extended release in patients with MDD. Escitalopram reduced relapse rate compared with placebo and increased the percentage of patients in remission in long-term trials (up to 52 weeks). Consistently significant improvements for all efficacy parameters were also observed in patients with generalised anxiety disorder, social anxiety disorder and panic disorder treated with escitalopram for 8-12 weeks in individual, randomised, placebo-controlled, double-blind investigations. The good tolerability profile of escitalopram is predictable and similar to that of RS-citalopram. Such adverse events as nausea, ejaculatory problems, diarrhoea and insomnia are expected but, with the exception of ejaculatory problems and nausea, which is mild and transient, these were generally no more frequent than with placebo in fully published clinical trials. No adverse events not previously seen in acute trials were reported with long-term use. CONCLUSIONS: Escitalopram, the S-enantiomer of RS-citalopram, is a highly selective inhibitor for the serotonin transporter, ameliorates depressive symptoms in patients with MDD at half the RS-citalopram dosage, has a rapid onset of symptom improvement and has a predictable tolerability profile of generally mild adverse events. Like RS-citalopram, escitalopram is expected to have a low propensity for drug interactions, a potential benefit in the management of patients with comorbidities. In combination, these properties place escitalopram, like other SSRIs, as first-line therapy in patients with MDD. Escitalopram is indicated for use in patients with panic disorder in Europe and, should further evidence confirm early findings that escitalopram reduces anxiety, the drug may well find an additional role in the management of anxiety disorders.
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