Anxiety disorders social phobia

Social anxiety avoidance Social phobia, panic disorder Antidepressants, beta blockers, benzo diazepines... 

Antidepressants are small heterocyclic molecules entering the circulation after oral administration and passing the blood-brain barrier to bind at numerous specific sites in the brain. They are used for treatment of depression, panic disorders, generalized anxiety disorder, social phobia, obsessive compulsive disorder, and other psychiatric disorders and nonpsychiatric states. 

HT has been implicated in the etiology of numerous disease states, including depression, anxiety, social phobia, schizophrenia, obsessive compulsive disorders,... 

Indeed, 5-HT is also a substrate for the 5-HT transporter, itself an important player in the treatment of depression, and more recently for the whole range of anxiety disorders spectrum (GAD, OCD, social and other phobias, panic and post-traumatic stress disorders). It is the target for SSRIs (selective serotonin reuptake inhibitors) such as fluoxetine, paroxetine, fluvoxamine, and citalopram or the more recent dual reuptake inhibitors (for 5-HT and noradrenaline, also known as SNRIs) such as venlafaxine. Currently, there are efforts to develop triple uptake inhibitors (5-HT, NE, and DA). Further combinations are possible, e.g. SB-649915, a combined 5-HTia, 5-HT1b, 5-HT1d inhibitor/selective serotonin reuptake inhibitor (SSRI), is investigated for the treatment of major depressive disorder. 

Nutt D, Baldwin D, Beaumont G, et al (1999). Guidelines for the management of social phobia/social anxiety disorder. Primary Care... 

Rees CS, Richards JC, Smith LM (1998). Medical utilisation and costs in panic disorder a comparison with social phobia. J Anxiety Disordl2A2 -55. 

Anxiety disorders, including panic disorder, obsessive-compulsive disorder, and social phobia... 

With a lifetime prevalence of 28.8%, anxiety disorders collectively represent the most prevalent Diagnostic and Statistical Manual of Mental Disorders, 4th edition, Text Revision (DSM-IV-TR)2 class of disorders, with specific phobia (12.5%) and social anxiety disorder (12.1%) being the most common.3 Recent reports from the National Comorbidity Survey Revised (NCS-R) estimate the lifetime and 1-year prevalence of generalized anxiety disorder (GAD) for those 18 years of age and older to be 5.7% and 3.1%, respectively.3,4 Rates for panic disorder (PD) are slightly lower, with an estimated 12-month prevalence of 2.7% and lifetime prevalence of 4.7%. 

Anxiety disorders represent a diverse class of illnesses, with varied ages of onset. For example, according to the NCS-R epidemiologic study,3 PD and GAD had a median age of onset of 24 and 31 years, respectively, whereas specific phobia and social anxiety disorder (SAD) tend to develop much earlier (median age of onset 7 and 13 years, respectively). Although GAD and PD may not manifest fully until adulthood, as many as half of adult anxiety patients report subthreshold symptoms during childhood.6... 

Often occurs in context of other anxiety disorders. The feared social or performance situation can be limited to a specific social interaction (e.g., public speaking) or generalized to most any social interaction. Differs from specific phobia, in which the fear and anxiety are limited to a particular object or situation (e.g., insects, heights, public transportation). 

Panic disorder Agoraphobia with panic disorder Agoraphobia without panic disorder Specific phobia Social phobia Generalised anxiety disorder Mild anxiety and depression disorder Obsessive compulsive disorder Acute stress disorder Post-traumatic stress disorder (PTSD) Adjustment disorder Panic disorder without agoraphobia Panic disorder with agoraphobia Agoraphobia Specific phobia Social phobia (also called social anxiety disorder) Generalised anxiety disorder Obsessive compulsive disorder Acute stress disorder Post-traumatic stress disorder (PTSD)... 

The development of mild forms of anxiety and neuroveg-etative and/or cognitive responses to stress may represent an adaptive evolutionary step against environmentally (external) or self-triggered (internal) threats, but maladaptive reactions have also emerged in human evolution. Thus, anxiety disorders are maladaptive conditions in which disproportionate responses to stress, or even self-evoked responses, are displayed. Anxiety disorders are one of the most frequent psychiatric illnesses, and have a lifetime prevalence of 15- 20% [1, 89]. The most common presentations are generalized anxiety disorder, with a lifetime prevalence rate of close to 5% [1, 89] social anxiety disorder, with very variable lifetime prevalence rates ranging from 2 to 14% [90] panic disorder, with rates from 2 to 4% [1,89] and post-traumatic stress disorder (PTSD), with a prevalence rate close to 8%. Specific phobias, acute stress and obsessive-compulsive behavior are other clinical presentations of anxiety disorders. 

Anxiety disorders such as Panic Disorder, PTSD, and phobias such as Social Phobia and Agoraphobia... 

Standardized cognitive behavioral therapy manuals, which ensure adherence to a treatment protocol, have been developed for many different anxiety disorders, including phobias, generalized anxiety, panic, social anxiety, Agoraphobia,... 

Social Anxiety Disorder (Social Phobia). Patients with social anxiety disorder can similarly experience persistent worry regarding a potentially embarrassing social interaction. In contrast, the patient with GAD worries about a variety of activities or events. 

There is something distinctly human about social anxiety. Mark Twain once remarked, Man is the only animal that blushes—or needs to. Although there are other mammalian species with complex social pecking orders, we, as humans, are particularly sensitive to how we are perceived by others. This sensitivity, when marked by a fear of evaluation by others, can become maladaptive. If that fear is transient and leads to little or no avoidance of social interactions, then it is considered normal shyness. However, when the social consequences of that fear become more pronounced, then the diagnosis of social phobia, now more commonly referred to as social anxiety disorder, is warranted. 

In recent years many of these primary care cases that would formerly have been seen as anxiety disorders have been portrayed as anxious-depressives and have led to treatment with antidepressants, in particular the more recent serotonin reuptake inhibitors. As part of this rebranding a variety of states such as panic disorder, post-traumatic stress disorder, social phobia and generalized anxiety disorder have appeared, along with more traditional disorders such as obsessive compulsive disorder (OCD). Many of these diagnoses are likely to lead to prescriptions of an SSRI although the evidence for benefit from SSRIs is poor except for OCD. 

In this chapter, we consider categorical anxiety disorders as defined by the standardized diagnostic criteria of American Psychiatric Association s Diagnostic and Statistical Manual for Psychiatric Disorders [i.e., DSM-III (1980), DSM-III-R (1987), DSM-IV (1994)]. The subtypes of anxiety states included are panic disorder, agoraphobia, specific phobia, social phobia, generahzed anxiety/overanxious disorder, separation anxiety, and obsessive-compulsive disorder. 

Few studies have examined noradrenergic function in patients with phobic disorders. In patients with specific phobias, increases in subjective anxiety and increased heart rate, blood pressure, plasma NE, and epinephrine have been associated with exposure to the phobic stimulus (Nesse et al. 1985). This finding may be of interest from the standpoint of the model of conditioned fear, reviewed above, in which a potentiated release of NE occurs in response to a reexposure to the original stressful stimulus. Patients with social phobia have been found to have greater increases in plasma NE in comparison to healthy controls and patients with panic disorder (Stein et al. 1992). In contrast to panic disorder patients, the density of lymphocyte a-adrenoceptors is normal in social phobic patients (Stein et al. 1993). The growth hormone response to intravenous clonidine (a marker of central a2-receptor function) is blunted in social phobia patients (Tancer et al. 1990). 

Southwick SM, Krystal JH, Bremner JD, Morgan CA, Nicolaou A, Nagy LM, Johnson DR, Heninger GR, Charney DS (1997) Noradrenergic and serotonergic fimction in posttraumatic stress disorder. Arch Gen Psychiatry 54 749-758 Stein MB, Tancer ME, Uhde TW (1992) Heart rate and plasma norepinephrine responsivity to orthostatic challenge in anxiety disorders. Comparison of patients with panic disorder and social phobia and normal control subjects. Arch Gen Psychiatry 49 311-317 Stein MB, Huzel LL, Delaney SM (1993) Lymphocyte b-adrenoceptors in social phobia. Biol Psychiatry 34 45-50... 

The key feature of specific phobia is an intense and persistent fear of circumscribed situations or specific stimuli (e.g. exposure to animals, blood). Confrontation with the situation or stimulus provokes almost invariably an immediate anxiety response. Often, the situation or stimulus is therefore avoided or endured with considerable dread. Adolescents and adults with this disorder recognize that this anxiety reaction is excessive or unreasonable, but this may not be the case in children. For a diagnosis according to DSM-IV, the avoidance, fear or anxious anticipation of the phobic stimulus must interfere with the persons daily life or the person must be markedly distressed about having the phobia. Further, the phobic reactions are not better explained by another mental disorder, such as, for example, social phobia. 

Study (country) reference Assessment instrument n Age Time frame Anxiety disorder (any) Panic disorder Agora- phobia Subtypes Specific Social phobia phobia GAD OCD PTSD... 

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