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>55% were observed in two of the studies, while in a third study the probability of remission with duloxetine treatment was nearly three times that observed with placebo (44% versus 16%). Duloxetine also produced significant improvement in painful physical symptoms compared with placebo, in many cases after only 2 weeks of treatment. The discontinuation rate due to adverse events (14.6%) was similar to those observed with selective serotonin reuptake inhibitors. The most frequently reported adverse events were nausea, dry mouth, fatigue, and insomnia. Conclusion. Duloxetine was demonstrated to be safe and effective in the treatment of MDD. The starting dose with the best balance of efficacy and tolerability is 60 mg QD.
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PMID:Duloxetine for the treatment of major depressive disorder. 1285 50

BACKGROUND: Depression is underdiagnosed in the primary care setting. Physical symptoms such as aches, pains, and gastrointestinal disturbance are frequently associated with major depressive disorder (MDD) and are often the presenting symptoms. Duloxetine, a dual-reuptake inhibitor of serotonin and norepinephrine, may have a positive effect on physical symptoms in addition to efficacy in treating emotional symptoms of depression. METHOD: Efficacy was evaluated in 6 double-blind, placebo- and/or active comparator-controlled trials of duloxetine for patients with MDD (DSM-IV criteria). Efficacy in depression was determined primarily using the 17-item Hamilton Rating Scale for Depression (HAM-D-17). Secondary efficacy measures included subscales of the HAM-D-17 and assessment of physical symptoms. Safety evaluations included adverse events, vital signs, laboratory analyses, and electrocardiograms. Safety was evaluated by pooling the data from the MDD trials and a study of duloxetine in nondepressed patients. RESULTS: Duloxetine demonstrated significant differences from placebo on core mood symptoms, physical symptoms (e.g., back pain), and global functioning as early as week 1 of treatment. The estimated probabilities of remission in the studies that demonstrated efficacy ranged from 43% to 57%. The most frequently observed adverse events for duloxetine-treated patients included nausea, dizziness, insomnia, fatigue, and somnolence. Duloxetine did not prolong corrected QT intervals, and the rate of sustained elevations of blood pressure did not differ significantly from placebo. CONCLUSION: In these studies, duloxetine was safe and effective in the treatment of both emotional and physical symptoms of MDD. Based on dose assessments, 60 mg q.d. appears to be the optimum starting and therapeutic dose.
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PMID:Duloxetine: A New Treatment for the Emotional and Physical Symptoms of Depression. 1515 43

Stress Urinary Incontinence is a common symptom among women. The urethral closure is insufficient. Pelvic floor exercise can minish the symptoms, but many women need an operation. Duloxetine, a new drug, is believed to strengthen the contraction of the external urethral sphincter through central neuromodulation, resulting in enhanced urethral closure during the urine storage phase. In controlled studies a significant effect are found in women suffer from Stress Urinary Incontinence. Discontinuate rates for adverse events were high especially nausea and fatigue. The adverse event deminish after 4 weeks.
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PMID:[Duloxetine. A new preparation for patients with urinary incontinence]. 1632 35

Diabetics develop numerous chronic associated diseases, among them sensory polyneuropathy. Diabetic polyneuropathy (DPN) often causes pain of various kinds, degree and duration. There are many pharmacological approaches: antidepressants are also important. Duloxetine is a recently approved dual action serotonin and noradrenaline re-uptake inhibitor that in its analgesic efficacy is comparable to established drugs. Duloxetine, in a dosage of 60 mg x 1 or x 2 daily, significantly reduces, from the first week of administration, the pain of DPN, when compared with a placebo. The most commonly observed side effects have been nausea, sleepiness, constipation and fatigue. On average duloxetine has not shown any clinically relevant increase in blood pressure, pulse rate and weight. It thus offers a new option as part of the treatment of pain caused by DPN. The various drugs should be considered individually in any treatment algorithm, also taking into account their side effects. Psychotherapeutic methods serve to support the overcoming of pain.
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PMID:[Duloxetine, a new therapeutic option for diabetic peripheral neuropathic pain]. 1713 88

Duloxetine is a newly introduced drug. It is being prescribed for the management of diabetic neuropathic pain and major depressive disorder. The most frequently observed adverse events with duloxetine are nausea, dry mouth and somnolence, constipation, diarrhea, decreased appetite, weight loss, feeling of fatigue, dizziness, somnolence, hypohidrosis, decreased libido and erectile dysfunction. One of the patients being prescribed the drug developed bleeding gums on being started with the drug which resolved on stopping it. We hereby report this case.
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PMID:Bleeding gums: duloxetine may be the cause. 1724 71

Fibromyalgia syndrome (FMS) is a chronic condition characterized by widespread pain, tender points, fatigue, and sleep disturbance. FMS leads to high disability levels, poor quality of life, and extensive use of medical care. Effective pharmacological treatment options are rare, and treatment effects are often of limited duration. Duloxetine is a new selective serotonin and norepinephrine reuptake inhibitor that is licensed for the treatment of pain in diabetic neuropathy. So far two randomized, placebo-controlled trials have investigated the short-term safety and efficacy of duloxetine 60 mg/day and 120 mg/day in patients suffering from FMS over a period of 12 weeks. Both dosages were superior to placebo in pain relief, and improvement in quality of life and depressive symptoms. The analgesic effect was largely independent of the antidepressant action of duloxetine. The higher dose of 120 mg/day further reduced the tender point count and elevated the tender point pain thresholds. Only mild to moderate adverse effects were reported. Duloxetine 60 mg/day and 120 mg/day has proven to be beneficial in the treatment of FMS symptoms. As true for other antidepressants further studies are needed to assess the long-term efficacy and safety of duloxetine as an additional pharmacological treatment option in FMS.
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PMID:New treatment options for fibromyalgia: critical appraisal of duloxetine. 1883 Mar 99

The underlying cause of fibromyalgia is not known, although dysfunction of serotoninergic and noradrenergic neurotransmitters appears to play an important role in the condition. Duloxetine is a newer and better tolerated dual antidepressant that does not induce muscarinic, histaminergic or adrenergic adverse reactions, and at the same time modulates and enhances the endogenous descending system that inhibits nociception. Duloxetine reduces pain symptoms in depression and other diseases and conditions, including fibromyalgia. Over 90% of the observed effect on pain is due to a direct analgesic effect rather than an indirect antidepressant effect. In clinical trials, pain reduction with duloxetine was not associated with its antidepressant and anxiolytic effects in patients with fybromialgia. A meta-analysis of four randomized, double-blind, placebo-controlled studies of duloxetine in the treatment of fibromyalgia showed it to be significantly superior to placebo in providing pain relief, reducing fatigue and improving physical and mental performance. The results of safety studies indicate that duloxetine is safe and well tolerated. Adverse effects tend to be mild, appearing more often at the start of therapy and decreasing or disappearing over the course of continued treatment.
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PMID:Duloxetine for the treatment of fibromyalgia. 1913 26

Since depression impacts all body systems, antidepressant treatments should relieve both the emotional and physical symptoms of depression. Duloxetine demonstrated antidepressant efficacy at a dose of 60 mg qd in two placebo-controlled, randomized, double-blind studies and significantly improved remission rates compared with placebo. Duloxetine-treated patients had significant reduction in severity of the symptoms of depression as assessed by the HAM-D(17), anxious symptoms as measured by the HAM-A and quality of life measures compared to placebo. Duloxetine also improved somatic symptoms, particularly painful symptoms which may have contributed to significantly improved remission rates compared to placebo. Approximately 10% of the 1139 patients with major depressive disorder in placebo-controlled trials discontinued treatment due to an adverse event, compared to 4% of the 777 patients receiving placebo. In addition to nausea (1.4% incidence), which was the most common reason for discontinuation, dizziness, somnolence, and fatigue were the most common AEs reported as reasons for discontinuation and all were considered drug-related. Duloxetine treatment lacks effects on ECG, increases heart rate, and has little effect on blood pressure or weight.
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PMID:Duloxetine in the treatment of major depressive disorder. 1930 May 53

Duloxetine (Cymbalta(R)) is a potent serotonin and noradrenaline (norepinephrine) reuptake inhibitor (SNRI) in the CNS. It is indicated for the treatment of generalized anxiety disorder (GAD) as well as other indications. In patients with GAD of at least moderate severity, oral duloxetine 60-120 mg once daily was effective with regard to improvement from baseline in assessments of anxiety and functional impairment, and numerous other clinical endpoints. Longer-term duloxetine 60-120 mg once daily also demonstrated efficacy in preventing or delaying relapse in responders among patients with GAD. In addition, duloxetine was generally well tolerated, with most adverse events being of mild to moderate severity in patients with GAD in short- and longer-term trials. Additional comparative and pharmacoeconomic studies are required to position duloxetine among other selective serotonin reuptake inhibitors and SNRIs. However, available clinical data, and current treatment guidelines, indicate that duloxetine is an effective first-line treatment option for the management of GAD. Duloxetine is a potent and selective inhibitor of serotonin and noradrenaline transporters, and a weak inhibitor of dopamine transporters. It has a low affinity for neuronal receptors, such as alpha(1)- and alpha(2)-adrenergic, dopamine D(2), histamine H(1), muscarinic, opioid and serotonin receptors, as well as ion channel binding sites and other neurotransmitter transporters, such as choline and GABA transporters. It does not inhibit monoamine oxidase types A or B. The pharmacokinetics of duloxetine in healthy volunteers were dose proportional over the range of 40-120 mg once daily. Steady state was typically reached by day 3 of administration. Duloxetine may be administered without regard to food or time of day. Duloxetine is highly protein bound and is widely distributed throughout tissues. It is rapidly and extensively metabolized in the liver by cytochrome P450 (CYP) 1A2 and 2D6, and its numerous metabolites, which are inactive, are mainly excreted in the urine. The mean elimination half-life of duloxetine is approximately 12 hours. Duloxetine is a substrate for CYP1A2 and CYP2D6 and a moderate inhibitor of CYP2D6. Concomitant use of duloxetine and potent CYP1A2 inhibitors should be avoided and duloxetine should be used with caution in patients receiving drugs that are extensively metabolized by CYP2D6, particularly those with a narrow therapeutic index. Duloxetine was effective in the short-term treatment of patients with primary GAD of at least moderate severity. In four randomized, double-blind, placebo-controlled, multicentre, phase III trials, duloxetine 60-120 mg once daily for 9 or 10 weeks was significantly more effective than placebo with regard to the primary endpoint of mean change in Hamilton Anxiety Rating Scale (HAM-A) total score from baseline to study endpoint. In addition, all other endpoints were generally improved from baseline to a greater extent with duloxetine 60-120 mg once daily than with placebo. Duloxetine also improved patient role functioning (assessed using Sheehan Disability Scale global impairment functioning scores), health-related quality of life and patient well-being compared with placebo. Duloxetine was effective in patients with GAD who were aged >/=65 years. Pooled results of data from the two short-term efficacy trials that also included an active comparator arm showed that the mean change in HAM-A scores with duloxetine relative to placebo were of the same magnitude as those with venlafaxine extended release versus placebo. Duloxetine 60-120 mg once daily was also more effective than placebo in preventing or delaying relapse in responders to duloxetine in a longer-term study. In this study, patients with GAD received duloxetine during a 26-week, open-label, acute treatment phase and responders were then randomized to continue on duloxetine or receive placebo during a 26-week, double-blind, continuation phase. Time to relapse was significantly longer in duloxetine recipients than in placebo recipients. In addition, significantly fewer duloxetine recipients than placebo recipients relapsed during the double-blind phase of the trial and more duloxetine recipients achieved remission. Short- (9-10 weeks) and longer-term (52 weeks) treatment with duloxetine 60-120 mg once daily was generally well tolerated in patients with GAD, with the majority of adverse events being of mild to moderate severity. Nausea, dry mouth, headache, constipation, dizziness and fatigue were among the most common treatment-emergent adverse events. The adverse event profile of duloxetine did not differ with dose or treatment duration. Significantly more patients receiving short-term duloxetine than placebo discontinued treatment because of an adverse event, with nausea being the only event that resulted in significantly more treatment discontinuations in duloxetine recipients than in placebo recipients. Serious adverse events were uncommon with both short- and longer-term duloxetine treatment. Two episodes of attempted suicide and one episode of completed suicide occurred in duloxetine recipients during the 24-week open-label phase of a longer-term trial. No deaths or suicides were reported in any of the short-term trials. Discontinuation-emergent adverse events, most commonly nausea and dizziness, occurred in up to one-third of duloxetine recipients in the short-term trials.
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PMID:Duloxetine: a review of its use in the treatment of generalized anxiety disorder. 1948 Apr 70

(1) Fibromyalgia is characterised by a range of symptoms that include muscle pain, fatigue and sleep disorders. Anxiety and depression are often also present. The cause is unknown. More women than men are affected; (2) The following review focuses on differential diagnoses and available treatments for fibromyalgia, based on a review of the literature using the standard Prescrire methodology; (3) Fibromyalgia is mainly diagnosed by excluding other possibilities. The principal differential diagnoses are rheumatic involvement of the spine, systemic inflammatory disorders, and hypothyroidism. Unlike these other conditions, fibromyalgia is not associated with radiological or laboratory abnormalities; (4) Paracetamol has not been compared with other treatments in fibromyalgia. Nonsteroidal antiinflammatory drugs have no specific effect; (5) The only two trials assessing tramadol showed little effect; in one study the average pain score was 53 mm in the tramadol group versus 65 mm in the placebo group, on a scale ranging from 0 to 100 mm. The adverse effects of tramadol are those of opiates in general, mainly nausea and dependence. Tramadol interacts with numerous other drugs; (6) The efficacy of tricyclic antidepressants is also difficult to quantify. Their limited superiority over placebo lasts no more than a few months. The efficacy of selective serotonin reuptake inhibitor antidepressants (fluoxetine, paroxetine and citalopram), serotonin and nonadrenaline reuptake inhibitors (duloxetine and milnacipran) is even less well established. Duloxetine has been tested in four placebo-controlled trials with unconvincing results; (7) Pregabalin and gabapentin, two antiepileptic drugs, appear to be more effective than placebo but have only been tested in short-term trials. In one trial 44% of patients in the pregabalin group said they felt better after 13 weeks versus 35% of patients in the placebo group. However, adverse effects are frequent and sometimes troublesome (drowsiness, dizziness, nausea, weight gain). In clinical trials, 19% to 33% of patients stopped treatment due to adverse effects after 13 weeks, depending on the dose of pregabalin; (8) Assessments of non-drug treatments in this setting are generally mediocre. The best-assessed alternative therapies (acupuncture and physical exercise) only have a limited effect; (9) In practice, when a patient presents with symptoms compatible with fibromyalgia, the first step is to rule out a treatable condition. Quality of life may be improved by first acknowledging that the pain is real, and possibly by providing psychological, medical, social and occupational support. The limited efficacy of available drugs, and their potential adverse effects, should be discussed with the patient.
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PMID:Fibromyalgia: poorly understood; treatments are disappointing. 1974 61


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