Managing Pain in Fibromyalgia: Current and Future Options.

Pain relief is a key element of fibromyalgia (FM) treatment. Current guidelines recommend antidepressant (i.e. serotonin-norepinephrine reuptake inhibitors) and anticonvulsant medications (gabapentin/pregabalin), drugs that provide only modest relief, with limitations primarily driven by side effects. In contrast, traditional analgesic drugs, although not sufficiently tested in FM, are commonly used by patients. This dearth of effective treatments has led to isolated, mostly small studies of less familiar drug treatments for FM-related pain. Although no single drug has emerged with appreciable effect, some agents such as cannabinoids and naltrexone, amongst others, have shown some pain modulatory effects. In the absence of drugs in the pipeline, non-pharmacological interventions such as behavioural interventions, neuromodulation techniques and faecal transplantation have been studied. This narrative review will focus on drugs and interventions that have been examined in recent years to modulate pain in FM.