A Review of Treatment Modalities for Comorbid Neuropathic Pain and Depression

Over the past years, a number of clinical and preclinical investigations have been documented, suggesting treatment strategies and pharmaceuticals for neuropathic pain and depressive disorders, potentially beneficial in cases where these conditions are comorbid. This review lists these potential treatment options and discusses the proposed underlying mechanisms of action and their limitations, in terms of both physiotherapy and pharmacotherapy. Physiotherapy includes electroacupuncture and repetitive transcranial magnetic stimulation therapy, both of which affect neuronal function by altering the physiological state of the neurons. Pharmacological treatments include tricyclic antidepressants, gabapentin, ketamine, minocycline, and Chinese medicine, which alter ion channel activity, affect neurotransmitter release, and exert anti-inflammatory effects. As such, this review may help to improve future research endeavors and therapeutic options for this frequently occurring comorbidity.