Since the guideline’s publication in April 2002, a substantial amount of controlled research has emerged on the treatment of bipolar disorder, including the acute treatment of depression, the acute treatment of mania, and maintenance and prophylaxis. APA practice guidelines are revised at regular intervals, about every 5 years, depending on available resources. Between revisions, in an effort to keep recommendations current and useful, the project now publishes "guideline watches." Watches briefly describe major developments in the scientific literature that could lead clinicians to treat patients in a manner different from what the guidelines recommend. They are published online at http://www.psych.org/psych_pract/treatg/pg/prac_guide.cfm. We look forward to updating the bipolar disorder guideline in the near future.