The FDA has approved Onyda XR (Tris), an extended-release (ER) oral suspension formulation of the alpha_2-adrenergic agonist clonidine, for use as monotherapy or as an adjunct to stimulant therapy for treatment of attention-deficit/hyperactivity disorder (ADHD) in children ≥6 years old. Clonidine ER tablets have been available for years for treatment of ADHD in children 6-17 years old.

Attention-deficit/hyperactivity disorder (ADHD) is a chronic neurodevelopmental disorder that has been diagnosed in up to 10% of school-age children in the US and frequently persists into adulthood. A study in a large Danish cohort found that ADHD was associated with higher mortality rates in children, adolescents, and adults, mainly due to accidents. Pharmacologic treatment of ADHD in children has been reported to decrease the risk of substance abuse in adolescents, and use of ADHD medications in adults has been associated with a reduced risk of serious traffic accidents and criminal behavior.4-6 Drugs approved by the FDA for treatment of ADHD are listed in Table 1.

Attention-deficit/hyperactivity disorder (ADHD) is a disruptive behavior disorder that has been diagnosed in up to 10% of school-age children in the US, most often in boys, and frequently persists into adulthood. A recent study in a large Danish cohort found that ADHD was associated with increased mortality in children, adolescents, and adults, mainly due to accidents. Pharmacologic treatment of ADHD has been reported to lower the risk of serious traffic accidents and criminal behavior.

Attention-deficit/hyperactivity disorder (ADHD) is a disruptive behavior disorder that occurs in about 5% of school-age children, most often in boys, and frequently persists into young adulthood.

The FDA has approved an extended-release formulation of clonidine hydrochloride (Kapvay– Shionogi) for treatment of attention-deficit/hyperactivity disorder (ADHD) in children 6-17 years old. It is the second alpha₂-adrenergic agonist approved for this indication; guanfacine hydrochloride (Intuniv) was the first, but only clonidine is approved for use with stimulants.

An extended-release oral formulation of guanfacine hydrochloride (Intuniv – Shire), a selective alpha_2A-adrenergic agonist, has been approved by the FDA for treatment of attention-deficit/hyperactivity disorder (ADHD) in children 6-17 years old.

Many drugs can cause psychiatric symptoms, but a causal connection is often difficult to establish. Psychiatric symptoms that emerge during drug treatment could also be due to the underlying illness, previously unrecognized psychopathology, or psychosocial factors. The withdrawal of some drugs can cause symptoms such as anxiety, psychosis, delirium, agitation or depression.

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Attention-deficit/hyperactivity disorder (ADHD) is a disruptive behavior disorder that occurs in 5-7% of school-age children and has also been estimated to occur in about 4% of adults. ADHD is characterized by a persistent pattern of frequent, severe inattention and/or hyperactivity/impulsivity that starts before the age of 7, is present in 2 or more settings (such as home and school), causes significant impairment in function, and is not caused by another mental disorder. The drugs approved for treatment of ADHD by the FDA are listed in this article. Except for atomoxetine, they are all stimulants and are classified as controlled substances by the US Drug Enforcement Administration (DEA).

The FDA recently cleared the AmpliChip CYP450 Test (Roche), which analyzes blood-derived DNA to detect genetic variations in the activity of cytochrome P450 (CYP) enzymes CYP2D6 and CYP2C19 and determines the metabolizer status of the patient. The test is intended to help guide clinicians in prescribing individualized drug therapy. About 25% of all drugs, including many antidepressants and antipsychotics, are substrates of either CYP2D6 or CYP2C19. The test is being promoted initially to psychiatrists.

Atomoxetine (Strattera - Lilly), a nonstimulant drug that is not a controlled substance, was approved by the FDA in early 2003 for the treatment of attention deficit hyperactivity disorder (ADHD). At that time, The Medical Letter concluded that it was unclear whether atomoxetine was as effective as stimulants such as methylphenidate (Concerta, and others) (Medical Letter 2003; 45:11). Since then, the drug has been heavily advertised directly to the public for use in both children and adults.

Changes caused by one drug in the absorption, distribution, metabolism or excretion of another may lead to a pharmacokinetic adverse drug interaction (DN Juurlink et al, JAMA 2003; 289:1652). Additive drug interactions, such as vasodilation caused by both sildenafil (Viagra) and nitrates, can also have adverse effects.

Atomoxetine (Strattera - Lilly) is the first non-stimulant drug to be approved by the FDA for treatment of attention deficit hyperactivity disorder (ADHD). Unlike other drugs approved for use in ADHD, it is not a controlled substance and is approved for use in adults as well as children. Older non-stimulant drugs that have been used to treat ADHD, although not FDA-approved, include the alpha₂-agonist clonidine (Catapres, and others) and the tricyclic antidepressant desipramine (Norpramin, and others) (Medical Letter 1996; 38:109).