Treatment of Anhedonia, Sadness, and Fatigue

Introduction to Treatment

• The American College of Physicians recommends cognitive-behavioral therapy (CBT) or second-generation antidepressants (selective serotonin reuptake inhibitors) as the first-line treatment for anhedonia, sadness, and fatigue, after discussing treatment effects, adverse effect profiles, cost, accessibility, and patient preferences 1

Diagnosis and Symptoms

• The symptoms of anhedonia (loss of interest or pleasure), sadness, and fatigue are central to major depressive disorder (MDD), which requires at least 2 weeks of symptoms affecting normal functioning, including changes in appetite or weight, insomnia or hypersomnia, agitation or psychomotor retardation, fatigue or loss of energy, feelings of worthlessness or excessive guilt, diminished ability to think or concentrate, and recurrent thoughts of death or suicide 1

Treatment Recommendations

• The American College of Physicians recommends CBT or selective serotonin reuptake inhibitors as the first-line treatment, with evidence of high quality 1
• Exercise, such as moderate exercise for 30-60 minutes, 2-3 times a week, can improve functional capacity and reduce fatigue, and should be adapted to the patient's physical condition 2
• Establishing regular sleep schedules, avoiding caffeine after noon, and creating a sleep-conducive environment (dark, quiet, comfortable) can help improve sleep 3
• Energy conservation strategies can help patients prioritize activities and manage energy expenditure, and can be tailored to the patient's needs and lifestyle, as suggested by the National Comprehensive Cancer Network 4
• Cognitive Behavioral Therapy (CBT) addresses cognitive and behavioral factors that may influence fatigue, and can be used in conjunction with other therapies 5

Pharmacologic Interventions

• Methylphenidate is a recommended medication for managing fatigue, with a starting dose of 2.5-5 mg daily or twice daily, and a gradual titration to 5-30 mg/day, usually divided as twice daily dosing 6
• Modafinil 50-100 mg daily can be considered as an alternative to methylphenidate, with a potential increase to 50-400 mg/day, although it has a higher cost compared to methylphenidate 6
• The National Comprehensive Cancer Network notes that modafinil has shown modest efficacy in treating cancer-related fatigue, particularly for severe fatigue 7
• The following table summarizes the pharmacologic interventions:

• Methylphenidate is contraindicated in patients with uncontrolled hypertension, underlying coronary artery disease, tachyarrhythmias, or a history of substance abuse, and should be used with caution in these populations 6

Treatment Duration and Monitoring

• Treatment should be maintained for at least 4-9 months after symptom remission to prevent relapse, and possibly longer (≥1 year) to prevent recurrence 1
• The American College of Physicians recommends evaluating treatment response after 4-6 weeks, and adjusting treatment as needed, such as increasing the dose of antidepressants or switching to another antidepressant or combining CBT with pharmacotherapy 1
• Sleep hygiene practices, such as establishing a consistent sleep schedule and creating a relaxing sleep environment, can optimize sleep patterns and reduce fatigue, as recommended by the National Comprehensive Cancer Network 4
• Exercise programs, including moderate-intensity aerobic exercise, can improve functional capacity and reduce fatigue in patients, with a recommended duration and frequency of at least 30 minutes, 3-4 times per week 3