rapid cycling
A course specifier in bipolar disorder indicating four or more mood episodes within a 12-month period.
Full Definition
Rapid cycling is a clinical course specifier used in bipolar disorder diagnosis when a patient experiences four or more distinct mood episodes (major depressive, manic, mixed, or hypomanic) within a 12-month period. Episodes must be demarcated by either a period of full remission lasting at least two months or by a switch to an episode of opposite polarity. Rapid cycling affects approximately 10-20% of individuals with bipolar disorder and is associated with several factors including antidepressant use, substance abuse, medical comorbidities (particularly thyroid dysfunction), and female gender. Patients with rapid cycling typically have a poorer prognosis, increased suicidality, and may require different treatment approaches compared to those with typical cycling patterns.
Usage
Usage note: Always hyphenate when used as an adjective; can be written as two words when used as a noun.
In Context
- "The patient's rapid cycling pattern complicated medication management and required mood stabilizer optimization." — Psychiatric consultation note
- "Rapid cycling bipolar disorder often necessitates discontinuation of antidepressant medications." — Treatment guideline