Nefazodone for patients with chronic fatigue syndrome.

OBJECTIVE: Patients with chronic fatigue syndrome (CFS) present with a variety of musculoskeletal, neurocognitive, sleep disturbance and mood symptoms. An open evaluation of the clinical utility of the novel antidepressant compound, nefazodone, was completed. METHOD: Ten patients with CFS presenting for assessment by a specialist psychiatrist were treated with nefazodone. Patients treated within this specialist service are also advised to engage in appropriate behavioural and sleep-wake cycle strategies to improve their level of functioning. RESULTS: Of the 10 patients, eight (80%) reported at least some improvement in the key symptom of fatigue, with four (40%) reporting moderate or marked symptom relief. Additionally, sleep disturbance and mood were both moderately or markedly improved in seven (70%) and eight (80%) of the patients, respectively. Five of the patients (50%) achieved at least a moderate improvement in overall functional outcome and were able to return to work or their previous level of role function. The mean dose of nefazodone was 370 mg/day (range = 200-800 mg), with a strong preference for nocturnal dosing. Seven of the patients had previously failed to respond to moclobemide, while seven had previously failed to respond to conventional antidepressant therapy. CONCLUSION: Nefazodone appears to be worthy of further systematic investigation in patients with CFS. Given its effects on sleep, mood and anxiety symptoms, it may have particular advantages in patients with this disorder.