Persistent insomnia is highly prevalent complaint in cancer survivors, but is seldom satisfactorily addressed. The adaptation to cancer care of a validated, cost-effective intervention may offer a practicable solution. The aim of this study was to investigate the clinical effectiveness of homeopathy for insomnia.

Inclusion Criteria:

• scheduled to begin chemotherapy or radiotherapy
• chemotherapy or radiotherapy
• meet diagnostic criteria for chronic insomnia (i.e., lasting for at least one month)
• Chronic insomnia has been defined in previous research:as the presence of (1) three or more episodes of insomnia (i.e., ≥ 30minuteSOL, ≥ 60minute wake after sleep onset (WASO), or ≤ 6.5 hour total sleep time (TST) per night) of per week and (2) daytime effects of insomnia, such as irritability, difficulty concentrating, or fatigue for at least one month.
• have the permission of their oncologists to participate.

Exclusion Criteria:

• untreated alcohol or substance abuse or dependence,
• bipolar, or psychotic disordermedical conditions such as seizure disorder, restless leg disorder, or Parkinson's disease
• untreated sleep disorders such as sleep apnea
• Taking other alternative medicines