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Effect of Naltrexone + Transcranial direct current stimulation on fibromyalgia

Fibromyalgia Fibromyalgia
Fibromyalgia Fibromyalgia

In a double-blinded, randomized, parallel clinical study, it was determined if low-dose Naltrexone (LDN) + transcranial direct current stimulation (tDCS) had analgesic and neuromodulatory effects on fibromyalgia patients.

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Key take away

Combination of low-dose Naltrexone and transcranial direct current stimulation in fibromyalgia patients has a favorable safety profile and exhibits potential benefits in lowering pain frequency and severity.

Background

In a double-blinded, randomized, parallel clinical study, it was determined if low-dose Naltrexone (LDN) + transcranial direct current stimulation (tDCS) had analgesic and neuromodulatory effects on fibromyalgia patients.

Method

Four groups were created out of a total of 86 fibromyalgia-affected women: LDN + tDCS (n = 21), LDN + tDCS Sham (n = 22), placebo + tDCS (n = 22), and placebo + tDCS Sham (n = 21). In the last 5 sessions of the 26-day LDN or placebo (p.o.) treatment, tDCS was used (sham or active, 20 minutes, 2 mA).

Conditioned Pain Modulation (CPM), Pain Pressure Threshold (PPT), Profile of Chronic Pain Scale (PCP:S), Beck Depression Inventory (BDI-II), Fibromyalgia Impact Questionnaire (FIQ), State-Trait Anxiety Inventory (STAI), Pain Catastrophizing Scale (PCS), Visual Analog Scale (VAS), and Sociodemographic data were all evaluated. Blood samples were taken in order to measure levels of brain-derived neurotrophic factor (BDNF) in serum.

Result

Regarding all metrics, there was no discernible change at the baseline. In the LDN + tDCS, LDN + tDCS Sham, and placebo + tDCS Sham groups, VAS pain considerably decreased, as shown in Table 1:

In terms of PCP:S, the LDN+tDCS group demonstrated decreased pain severity and frequency as well as reduced impact of pain on emotions and activities. Symptoms of depression decreased following all active treatments.

Conclusion

Although a placebo effect was seen in pain measured by the VAS, combined LDN+tDCS exhibited advantages in lowering fibromyalgia pain severity and frequency. However, more research is required to examine any potential associations.

Source:

Brazilian Journal of Anesthesiology

Article:

Association of low-dose Naltrexone and transcranial direct current stimulation in fibromyalgia: a randomized, double-blinded, parallel clinical trial

Authors:

Tânia Maria Hendges de Paula et al.

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