HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS Psychiatric Bulletin Advances in Psychiatric Treatment All RCPsych Journals		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Kuan, A. J. Articles by Young, A. H. Search for Related Content PubMed PubMed Citation Articles by Kuan, A. J. Articles by Young, A. H.

Attention-deficit hyperactivity disorder and mood disorders in adults

Department of Psychiatry, University of British Columbia, 2255 Wesbrook Mall, Vancouver BC, V6T 2A1, Canada.

A. H. Young

Department of Psychiatry, University of British Columbia, Canada

Correspondence: Email: anniekuan{at}gmail.com

Asherson et al (2007) raise some important issues regarding adult attention-deficit hyperactivity disorder (ADHD). They state that some symptoms of bipolar disorder are similar to those of ADHD but the distinction is not difficult. However, although ADHD and classic euphoric mania (bipolar I) may be distinct, differentiation of ADHD and bipolar disorder may be difficult, especially in bipolar II, bipolar-spectrum disorder and episodes of mixed symptomatology. At times, it may be almost impossible to discriminate solely by symptoms. Irritability, excessive activity, impulsive behaviour, poor judgement and denial of problems are characteristic of both ADHD and bipolar disorder, thus making diagnosis difficult. The two also clearly occur together in some individuals: the reported overall lifetime prevalence of comorbid ADHD in people with bipolar disorder is 9.5% (Nierenberg et al, 2005); comorbidity with unipolar disorder is also frequent.

Asherson et al state that ADHD is a persistent trait whereas bipolar disorder is episodic. However, inter-episodic symptoms are common in bipolar disorder and the course of both bi- and unipolar disorder is frequently chronic; for example, up to 13% of people with bipolar disorder report continuous cycling without a well phase and 54% are not fully euthymic between episodes (Kupka et al, 2001).

Children of mothers with bipolar I disorder have increased rates of both unipolar disorder and ADHD, further suggesting a neurobiological overlap of these three diagnoses. Hirshfeld-Becker et al (2006) report significantly higher rates (23.5%) of ADHD in offspring of parents with bipolar disorder compared with psychiatric comparison parents (8.4%) and non-psychiatric comparison parents (4.2%).

Drug treatments also overlap. Stimulant-type medication has been used in bipolar depression, and newer medications such as atomoxetine have similar pharmacological characteristics to some antidepressants (Lydon & El-Mallakh, 2006). Catecholaminergic antidepressants are not only potentially of benefit in ADHD but may be less likely to destabilise bipolar disorder.

There is thus a clinical and neurobiological overlap between ADHD, bipolar and unipolar disorder. Asherson et al’s timely editorial has reminded us that ADHD in adults should not be overlooked and that further research is needed to clarify its impact on other adult psychopathology and comorbidity, particularly in mood disorders.

REFERENCES

Asherson, P., Chen, W., Craddock, B., et al (2007) Adult attention-deficit hyperactivity disorder: recognition and treatment in general adult psychiatry. British Journal of Psychiatry, 190, 4 –5.[Abstract/Free Full Text]

Hirshfeld-Becker, D. R., Biederman, J., Henin, A., et al (2006) Psychopathology in the young offspring of parents with bipolar disorder: a controlled pilot study. Psychiatry Research, 145, 155 -167.[CrossRef][Medline]

Kupka, R. W., Bolen, W. A., Altshuler, L. L., et al (2001) The Stanley Foundation Bipolar Network. 2. Preliminary summary of demographics, course of illness and response to novel treatments. British Journal of Psychiatry, 178 (suppl. 41), s177 –s183.

Lydon, E. & El-Mallakh, R. S. (2006) Naturalistic long-term use of methylphenidate in bipolar disorder. Journal of Clinical Psychopharmacology, 26, 516 –518.[CrossRef][Medline]

Nierenberg, A. A., Miyahara, S., Spencer, T., et al (2005) Clinical and diagnostic implications of lifetime attention-deficit/hyperactivity disorder comorbidity in adults with bipolar disorder: data from the first 1000 STEP-BD participants. Biological Psychiatry, 57, 1467 –1473.[CrossRef][Medline]

This Article Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Kuan, A. J. Articles by Young, A. H. Search for Related Content PubMed PubMed Citation Articles by Kuan, A. J. Articles by Young, A. H.