Comorbidity depression and

It is considered a second-line agent for GAD because of inconsistent reports of efficacy, delayed onset of effect, and lack of efficacy for comorbid depressive and anxiety disorders (e.g., panic disorder or SAD). It is the agent of choice in patients who fail other anxiolytic therapies or in patients with a history of alcohol or substance abuse. It is not useful for situations requiring rapid antianxiety effects or as-needed therapy. 

Gordon JB. (1998). SSRIs and St. John s Wort possible toxicity Am Fam Physician. 57(5) 950-51. Gorman JM. (1996-97). Comorbid depression and anxiety spectrum disorders. Depression Anxiety. 4(4) 160-68. 

The efficacy of benzodiazepines in most anxiety disorders has been proved through extensive clinical experience and controlled trials (Faravelli et al. 2003), although it is important to note that they are not effective at treatingpost-traumatic stress disorder or comorbid depression, and there is less evidence to support their use in obsessive-compulsive disorder (OCD). Their anxiolytic effects have an immediate onset and in contrast to many other drugs, they do not cause a worsening of anxiety when therapy is initiated. 

The safety and efficacy of combined SSRI and stimulant pharmacotherapy have been addressed in two open studies. Gammon and Brown (1993) reported on the successful addition of fluoxetine to stimulants in the treatment of 32 patients with ADHD with comorbid depressive and anxiety disorders (Gammon and Brown 1993). These children with comorbid conditions had failed to respond to methylphenidate alone. Another report detailed the addition of methylphenidate to SSRI treatment (Findling, 1996). Depressed children and adults with comorbid ADHD were treated with either fluoxetine or sertraline. While depressive symptoms remitted, ADHD symptoms persisted. Methylphenidate was added and successfully treated the ADHD symptoms. In both investigations, the combined treatment was well tolerated. 

Findling, R. (1996). Open-label treatment of comorbid depression and attentional disorder with co-administration of SRI s and psychostimulants in children, adolescents, and adults a case series. / Child Adolescent Psychopharmacol 6 165—175. 

Comorbid personality disorders have long been associated with TRD and a poor response to antidepressant treatment. For example, Pfohl et al. (1984) observed only a 16% response rate in inpatients with comorbid depression and personality disorder compared with a 50% response rate in patients with pure depression. Similar results were reported from a study by D. W. Black et al. (1987), in which, with the use of ECT in addition to a TCA, the response rate among those with a comorbid Axis II disorder was lower, 42% compared with a 60% recovery in those without Axis II pathology. The best approach for these patients may be a combination of psychotherapy and medication. This approach was recently borne out by the Treatment of Depression Collaborative Research Project (Shea et al. 1990), which found that cognitive-behavioral therapy yielded a better response than either imipra-... 

The Hospital Anxiety and Depression Scale (HADS) is a 14-item self-report scale that was developed originally to indicate the possible presence of anxiety and depressive states in the setting of medical outpatients between 16 and 65 years (Zigmond and Snaith, 1983). The HADS is widely utilized in clinical trials of treatment of comorbid depression and/or anxiety symptoms in somatic disorders (stroke, cardiac disease, cancer, etc.). 

Preliminary research suggests efficacy in comorbid depression and ADHD... 

The anxiety disorders are a case in point. They comprise a range of conditions contiguous with the affective disorders and the stress responses (Table 4.1). Much overlap and comorbidity exist. Furthermore, definitions and diagnostic criteria have changed substantially over the years. For example, generalized anxiety disorder is a rare condition in its pure form, but a common condition if comorbid phobic and depressive disorders are accepted. 

Interpersonal therapy and cognitive behavioral therapy are types of psychotherapy that have well-documented efficacy for the treatment of MDD. Psychotherapy alone is an initial treatment option for mild to moderate cases of depression, and it may be useful when combined with pharmacotherapy in the treatment of more severe cases of depression. In fact, the combination of psychotherapy and pharmacotherapy can be more effective than either treatment modality alone in cases of severe or recurrent MDD. Psychotherapy can be especially helpful for patients with significant psychosocial stressors, interpersonal difficulties, or comorbid personality disorders.16... 

The mean age of onset of bipolar disorder is 20, although onset may occur in early childhood to the mid-40s.1 If the onset of symptoms occurs after 60 years of age, the condition is probably secondary to medical causes. Early onset of bipolar disorder is associated with greater comorbidities, more mood episodes, a greater proportion of days depressed, and greater lifetime risk of suicide attempts, compared to bipolar disorder with a later onset. Substance abuse and anxiety disorders are more common in patients with an early onset. Patients with bipolar disorder also have higher rates of suicidal thinking, suicidal attempts, and completed suicides. 

O The goals of therapy for GAD are to acutely reduce the severity and duration of anxiety symptoms and restore overall functioning. The long-term goal in GAD is to achieve and maintain remission. With a positive response to treatment, patients with GAD and comorbid depression should have minimal depressive symptoms. 

The initial dose of SSRI is similar to that used in depression. Patients should be titrated as tolerated to response. Many patients will require maximum recommended daily doses. Patients with comorbid panic disorder should be started on lower doses (Table 37-4). When discontinuing SSRIs, the dose should be tapered slowly to avoid withdrawal symptoms, with the possible exception of fluoxetine. Relapse rates may be as high as 50%, and patients should be monitored closely for several weeks.58 Side effects of SSRIs in SAD patients are similar to those seen in depression and most commonly include nausea, sexual dysfunction, somnolence, and sweating. 

ADHD is rarely encountered without comorbid conditions and often is underdiagnosed. Between 40% and 75% of patients with ADHD will have one or more comorbidities (e.g., learning disabilities, oppositional defiant conduct, anxiety, or depressive disorders).10 It is important to identify other coexisting conditions in patients with ADHD to assist in initial and ongoing selection of treatment. 

The tricyclic antidepressants (TCAs), such as imipramine, can alleviate symptoms of ADHD. Like bupropion, TCAs likely will improve symptoms associated with comorbid anxiety and depression. The mechanism of action of TCAs is in blocking norepinephrine transporters, thus increasing norepinephrine concentrations in the synapse the increase in norepinephrine is believed to alleviate the symptoms of ADHD. TCAs have been demonstrated to be an effective non-stimulant option for ADHD but less effective than stimulants. However, their use in ADHD has declined owing to case reports of sudden death and anticholinergic side effects6,13 (Table 39-3). Further, TCAs may lower seizure threshold and increase the risk of car-diotoxicity, (e.g., arrythmias). Patients starting on TCAs should have a baseline and routine electrocardiograms. 

Children of opiate addicts have been shown to have poorer social, educational and health status and to be at higher risk of abuse than their peers (Keen et al., 2000). However, given the high rates of psychiatric comorbidity (in particular, depression) in opiate-dependent patients (Brooner et al., 1997 Khantzian and Treece, 1985), it may be that some of the increased risk in children stems from this greater parental depression. Nunes et al. (1998) reported higher incidence of conduct disorder and global and social impairment for children of addicts with major depression compared to addicts without depression and controls, but not compared with children of depressed patients without substance use disorders. 

Neuroimaging of people with opioid dependence shows differences in this population compared to controls (Gerra et al. 1998). However, these differences may be more related to concurrent psychiatric disturbances than the opioid effects (Gerra et al. 1998). Chronic opioid dependence with comorbid depression is associated with decreased perfusion in the right frontal and left temporal lobes. A negative correlation... 

Primary care physicians are critical to the successful identification of GAD. Characterized by often-vague physical complaints, GAD must be distinguished from medical illnesses and other psychiatric disorders, though the high rate of comorbidity requires that a thorough evaluation for GAD be completed even when another disorder has been identified. GAD warrants particular consideration for those patients with nonspecific physical complaints who nevertheless have an urgent need for relief that has resulted in repeated office visits. The differential diagnosis for GAD includes other anxiety disorders, depression, and a variety of medical conditions and substance-induced syndromes. 

Monoamine Oxidase inhibitors (MAOis). Many, though not all, antidepressants are effective treatments for social anxiety disorder. Although they do not provide rapid symptom relief and may even transiently worsen anxiety symptoms during the first 1-2 weeks of treatment, antidepressants have the advantage of treating comorbid depression. 

The long-acting benzodiazepine clonazepam can be used as a first-line agent for those patients with particularly severe symptoms who are unable or unwilling to wait for the delayed therapeutic benefit of an antidepressant. Clonazepam can be initiated as a monotherapy for those without comorbid depression or in conjunction with an antidepressant for those who are also depressed. In the latter case, clonazepam can be used transiently with a plan to taper and discontinue it once sufficient time has elapsed to experience benefit from antidepressant therapy. 

Antidepressants are only recommended in the rehabilitation and continuing care stages of treatment for alcohol and cocaine dependence if the patient has a comorbid depressive or anxiety disorder. 

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