Treatment of ADHD in The Presence of Tic Disorders
Patients with Tourette's who are referred to specialty clinics have a high rate of comorbid attention-deficit hyperactivity disorder (ADHD), so the treatment of ADHD co-occurring with tics is often part of the clinical treatment of Tourette's. Patients who have ADHD along with Tourette's may also have problems with disruptive behaviors, overall functioning, and cognitive function, accounted for by the comorbid ADHD, highlighting the importance of identifying and treating other conditions when present.
The treatment of ADHD in the presence of tic disorders has long been a controversial topic. Past medical practice held that stimulants (such as Ritalin) could not be used in the presence of tics, due to concern that their use might worsen tics; however, multiple lines of research have shown that stimulants can be cautiously used in the presence of tic disorders. Several studies have shown that stimulants do not exacerbate tics any more than placebo does, and suggest that stimulants may even reduce tic severity. Controversy remains, and the PDR continues to carry a warning that stimulants should not be used in the presence of tic disorders, so physicians may be reluctant to use them. Others are comfortable using them and even advocate for a stimulant trial when ADHD co-occurs with tics, because the symptoms of ADHD can be more impairing than tics.
The stimulants are the first line of treatment for ADHD, with proven efficacy, but they do fail in up to 20% of cases, even in patients without tic disorders. Current prescribed stimulant medications include: methylphenidate (brand names Ritalin, Metadate, Concerta), dextroamphetamine (Dexedrine), and mixed amphetamine salts (Adderall). Other medications can be used when stimulants are not an option. These include the alpha-2 agonists (clonidine and guanfacine), tricyclic antidepressants (desipramine and nortriptyline), and newer antidepressants (bupropion, venlafaxine and atomoxetine). A retrospective case series published in 1993 suggested that treatment with bupropion (trade name Wellbutrin) can worsen tics, but there is no data from placebo-controlled trials to support this. There is good empirical support for the use of desipramine, bupropion and atomoxetine (brand name Strattera). Atomoxetine is the only non-controlled Food and Drug Administration (FDA) approved drug for the treatment of ADHD, but is less effective than stimulants for ADHD, is associated with individual cases of liver damage, carries an FDA black box warning regarding suicidal ideation, and controlled studies show increases in heart rate, decreases of body weight, decreased appetite and treatment-emergent nausea.
Read more about this topic: Treatment Of Tourette Syndrome
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