OBJECTIVE:To assess the effectiveness of selective serotonin reuptake inhibitors (SSRIs) in the management of chronic pain.
METHODS:Randomized, controlled trials of SSRIs in the management of chronic pain were identified by searching MEDLINE from 1966 to 1997 and by contacting the manufacturers of SSRIs available in the United States.
MAIN RESULTS:Nineteen studies were identified, including 10 on the treatment of headache, 3 on diabetic neuropathy, 3 on fibromyalgia, and 3 on mixed-chronic pain. SSRIs were consistently helpful for mixed-chronic pain. Results were conflicting for migraine headache, tension headache, diabetic neuropathy, and fibromyalgia. T he clinical management of chronic pain remains a challenge. Despite advances in pain research and clinical treatment, rates of disability due to chronic pain continue to climb worldwide. 1 Although chronic pain is treated with many medications, such as tricyclic antidepressants, nonsteroidal anti-inflammatory drugs, anticonvulsants, and opioids, none has shown outstanding efficacy. Narcotics are usually avoided because of the risk of developing tolerance, dependence, and functional deterioration. 2 Tricyclic antidepressants have proven efficacy in the treatment of chronic pain conditions such as diabetic neuropathy, fibromyalgia, chronic headaches, and post-herpetic neuralgia. 3 Their ability to relieve pain in these conditions appears to be independent of their antidepressant effect and may be related to their effect on neuronal reuptake of serotonin and norepinephrine. Unfortunately, side effects including dry mouth, constipation, orthostatic hypotension, and urinary retention often limit their use.
CONCLUSIONS:Fluoxetine was introduced as the first selective serotonin reuptake inhibitor (SSRI) in the United States in 1988. Since then, SSRIs have become the most frequently prescribed antidepressant medications owing to their favorable side-effect profile. 4 More than half of antidepressant prescriptions written in the primary care setting are for conditions other than depression. 5 There is considerable interest in the use of SSRIs for the management of chronic pain, although they are not currently approved by the Food and Drug Administration for this purpose. This review summarizes available data on the value of these medications for pain control in several clinical situations.
METHODSWe used the National Library of Medicine search engine to search MEDLINE from 1966 to 1997 using the medical subject heading (MeSH) term "pain," exploding it, and adding the following words in all fields: pain, neuropathy, migraine, and fibromyalgia. We also searched using the MeSH term "serotonin uptake inhibitors" and the following words in all fields: sertraline, paroxetine, fluoxetine, fluvoxamine, femoxetine, zimelidine, and citalopram. We combined results of these two searches with the term "and," and selected for review randomized double-blind, controlled studies published in English and performed on humans. References from studies reviewed provided additional sources of...