Treatment of Depression with Multiple Symptoms

Medication Properties and Symptom Targeting

The American Academy of Family Physicians recommends bupropion as an activating antidepressant that can improve energy levels and reduce apathy 1
Bupropion may cause insomnia if a second dose is taken after 3 PM, with a maximum dose of 150 mg twice daily for immediate release formulation 1
Mirtazapine is potent for promoting sleep, appetite, and weight gain, with dosing range from 7.5 mg to 30 mg at bedtime 1
Buspirone is primarily used for anxiety symptoms rather than core depression, with an initial dosage of 5 mg twice daily and a maximum of 20 mg three times daily 1

The American Academy of Family Physicians suggests that mirtazapine directly addresses insomnia through its sedating properties 1
Mirtazapine promotes appetite and weight gain, potentially counteracting any appetite suppression from bupropion 1
Buspirone primarily targets anxiety symptoms rather than the full spectrum of depression, with limited evidence for addressing fatigue, disinterest, or concentration issues 2, 3

Mirtazapine has superior efficacy for treating insomnia compared to most antidepressants 1
Buspirone has limited evidence for improving sleep in depressed patients 2, 3
Both combinations can address anxiety, but through different mechanisms 2, 3

Bupropion should not be used in patients with seizure disorders, and to minimize insomnia risk, the second dose should be given before 3 PM 1
Mirtazapine may cause weight gain and increased appetite, which could be beneficial or problematic depending on the patient 1
When using bupropion with mirtazapine, monitor for potential increased risk of seizures, especially at higher doses 1

The treatment algorithm recommends starting with bupropion at 37.5 mg every morning, increasing by 37.5 mg every 3 days to target dose of 150 mg twice daily, and adding mirtazapine starting at 7.5 mg at bedtime, titrating up to 30 mg at bedtime as needed 1
Assess response after 4-6 weeks of combined therapy at therapeutic doses, and monitor for improvement in specific target symptoms (sleep, anxiety, energy, concentration) 2, 3