Consider an evidence-based psychotherapy (CBT, IPT or PST) as an augmentation strategy instead of medication.
If using a medication for augmentation, consider this two step process:
Step 1. Choose either:
- Mirtazapine 30 mg po qhs x 2 weeks. If less than 20% response, consider increasing to 45 mg po qhs, or
- Bupropion XL 150 mg po daily x 2 weeks. If less than 20% response, consider increase to 300 mg po daily
- If on either Bupropion or Mirtazapine as an initial agent, consider augmenting with an SSRI or SNRI
If Step 1 interventions are ineffective or not tolerated, then proceed to Step 2…
- Aripiprazole 2 mg po daily x 2 weeks. If less than 20% response increase to 5 mg po daily, or
- Quetiapine XR 50 mg po at supper x 1 week, then increase to 100 mg x 1 week and if tolerated then increase it to150 mg po q supper. If less than 20% response after 2 weeks then increase to 300 mg po q supper
If a trial of a medication is not working, then consider switching from the current antidepressant class to a different antidepressant class. (Note however, evidence for this strategy is limited.)
If you decide to switch from one medication to another, this switching guide from Psychiatrie.nl may be helpful.