Attention-deficit/hyperactivity disorder with anxiety

Biederman J, Newcorn J, Sprich S. Comorbidity of attention deficit hyperactivity disorder with conduct, depressive, anxiety, and other disorders. Am J Psychiatry 1991 148 564-577. 

The developmental neurotoxicity guideline, accepted by OECD in 2007, has added the important aspect of behavioral effects of pre- and postnatal exposure to chemicals. This development arose from the notion that behavioral disorders in man such as anxiety, depression, phobias, autism, and attention deficit hyperactivity disorder, which appear to show increasing prevalences in western societies, may have a perinatal origin (4, 5). In the absence of causal inferences with respect to chemicals it seems nevertheless prudent to assess in a risk assessment whether such causal relations may exist. 

Comorbid conditions with other anxiety disorders, attention-deficit hyperactivity disorder, and tic disorders... 

Approximately three-quarters of children with OCD have comorbid diagnoses. These include tic disorders (24%-30%) and mood disorders, especially major depression (26%-29%). Riddle and colleagues (1990) found that 38% of children with OCD have other anxiety disorders, while Swedo (1989) more specifically identified increased rates of simple phobias (17%), overanxious disorder (16%), and separation anxiety disorder (7%). Other reported comorbidities include specific developmental disabilities, adjustment disorder with depressed mood, oppositional defiant disorder, attention-deficit hyperactivity disorder (ADHD), conduct disorder, and enuresis/encopresis (Swedo et ah, 1989b Riddle et ah, 1990). 

Younger children with manic symptoms tend to have severe functional impairment and comorbid psychopathology such as anxiety dysregulation, disruptive behaviors, and developmental delays that further complicate their clinical picture. In addition, these children may have mood symptoms that merge with other disorders, making manic episodes difficult to define. Irritability is part of the clinical picture of depression, anxiety, attention-deficit hyperactivity disorder (ADHD), and oppositional defiant disorder (ODD). Poor concen-... 

Prescription medications such as pain relievers, central nervous system (CNS) depressants (tranquilizers and sedatives), and stimulants are highly beneficial treatments for a variety of health conditions. Pain relievers enable individuals with chronic pain to lead productive lives tranquilizers can reduce anxiety and help patients with sleep disorders and stimulants help people with attention-deficit hyperactivity disorder (ADHD) focus their attention. Most people who take prescription medications use them responsibly. But when abused—that is, taken by someone other than the patient for whom the medication was prescribed or taken in a manner or dosage other than what was prescribed—prescription medications can produce serious adverse health effects, including addiction. 

Initially, the neuroleptics were used to manage severe anxiety, agitation, and aggression in individuals with severe mental illness such as schizophrenia, a psychotic illness characterized by delusions, hallucinations, and disorganized, illogical thinking. The first neuroleptic used in schizophrenia was chlorpromazine (Thorazine) in 1952. Additional neuroleptics were later developed to treat a variety of other disorders and conditions in children and adults, including autism, attention-deficit hyperactivity disorder (ADHD), bipolar dis-... 

A word about prevalence mental illness is more common than many people imagine. The current prevalence estimates are that about half the U.S. population meets the criteria for at least one mental disorder during a lifetime, with about 25 percent of the population meeting the criteria for at least one mental disorder during any given year.1 Of these disorders, the most prevalent are apparently anxiety disorders, followed by mood disorders (for example, major depressive disorder), impulse-control disorders (for example, attention deficit hyperactivity disorder [ADHD]), and substance disorders (for example, alcohol abuse). In contrast, the prevalence of psychosis as I define it here is only 2—3 percent of the U.S. population, and the world prevalence is about the same. 

Antidepressants tend to provide a more sustained and continuous improvement of the symptoms of attention-deficit/hyperactivity disorder than do the stimulants and do not induce tics or other abnormal movements sometimes associated with stimulants. Indeed, desipramine and nortriptyhne may effectively treat tic disorders, either in association with the use of stimulants or in patients with both attention deficit disorder and Tourette s syndrome. Antidepressants also are leading choices in the treatment of severe anxiety disorders, including panic disorder with agoraphobia, generalized anxiety disorder, social phobia, and obsessive-compulsive disorder, as weU as for the common comorbidity of anxiety in depressive illness. Antidepressants, especially SSRIs, also are employed in the management of posttraumatic stress disorder, which is marked by anxiety, startle, painful recollection of the traumatic events, and disturbed sleep. Initially, anxious patients often tolerate nonsedating antidepressants poorly (Table 17-1), requiring slowly increased doses. Their beneficial actions typically are delayed for several weeks in anxiety disorders, just as they are in major depression. 

Although the etiology of autism is not understood, the defining or core symptoms of autistic disorder are considered to be impaired social interaction, impaired verbal and nonverbal communication, and restrictive, repetitive patterns of behavior. In addition, most patients with a primary diagnosis of autism exhibit other neurological or psychiatric symptoms, which may include seizures, sleep disorders, anxiety, panic attacks, attention deficit/hyperactivity, self-injury, and cognitive impairment (Simonoff et ah, 2008). It is not known to what extent these comorbidities reflect the primary pathology of autism and to what extent they represent unrelated vulnerabilities that are exacerbated by the impaired social interaction and communication that is characteristic of the disorder. 

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