Review of Fibromyalgia (FM) Syndrome Treatments

Effectiveness and safety of cannabis-based products for medical use in patients with fibromyalgia syndrome: A systematic review

BACKGROUND

There is a need to explore pharmacological options for syndrome (FMS), such as medical cannabis. The aim of this systematic review was to synthesize and analyze the available information about the effectiveness/efficacy and safety of cannabis-based products for medical use (CBPMs) and cannabis-based medicines (CBMs), in patients with FMS.

METHODS

Interventional or observational studies, systematic reviews and meta-analysis regarding the effectiveness/efficacy and safety of CBPMs and CBMs in patients with FMS were retrieved from the PubMed/Medline database until April 2024. Then, the information was summarized in tables, with the type of CBPM and CBM, the method used in the study and the effective-ness/efficacy and safety outcomes.

RESULTS

19 publications were selected from the search or form the relevant references. Different CBPM and CBM were used across the studies. Also, different instruments for measuring the effectiveness were used. In general, the use of CBPMs and CBM showed an important improvement in pain, quality of life, and sleep habits. There were no serious adverse events.

CONCLUSIONS

The results show that CBMPs and CBMs could be effective and safe in patients with FMS; however, the evidence is limited and there is a need for high-quality clinical studies conducted with improved methodological design.

Enkephalins and Pain Modulation: Mechanisms of Action and Therapeutic Perspectives

Enkephalins, a subclass of endogenous opioid peptides, play a pivotal role in pain modulation. Enkephalins primarily exert their effects through opioid receptors located widely throughout both the central and peripheral nervous systems. This review will explore the mechanisms by which enkephalins produce analgesia, emotional regulation, neuroprotection, and other physiological effects. Furthermore, this review will analyze the involvement of enkephalins in the modulation of different pathologies characterized by severe pain. Understanding the complex role of enkephalins in pain processing provides valuable insight into potential therapeutic strategies for managing pain disorders.

Problem-oriented coping and resilience among Fibromyalgia patients who live under security threats and have undergone a Fibrotherapy intervention program

Our study examined the association between problem-focused coping and resilience among fibromyalgia (FM) patients who live under constant security threats. Resilience is a coping resource and detrimentally affects FM female patients (FMPs) to get up and cope with life. A cohort of 96 FMPs ages 19-75 was subjected to a Fibrotherapy intervention program in the Rehabilitation Help Center in Sderot (Ezra Le'Marpeh), Israel. We examined levels of problem-oriented coping and levels of resilience among the sample. In addition, we assessed whether there is a correlation between their resilience level and their medical metrics. The research included medical metrics and physical metrics. A cohort of 16 FMPs who participated in the quantitative phase composed the qualitative sample. Data from the t-test showed improved mental resilience among all the sample, with a significantly higher level among problem-oriented FMPs. We conclude that resilience is acquired through problem-oriented coping strategies. Furthermore, the association between resilience and problem-oriented coping helped to improve health indicators since coping with the disease included entering a regime of physicals activity and maintaining a healthy lifestyle.

Effects of traditional Chinese exercises in fibromyalgia syndrome: A meta-analysis of randomized controlled trials

OBJECTIVES

To explore the efficacy and safety of five traditional Chinese exercises (TCEs) in patients with fibromyalgia syndrome (FMS).

METHODS

The PubMed, Embase, Scopus, ProQuest, Web of Science, Cochrane, CNKI, WanFang, and VIP databases were comprehensively searched for randomized controlled trials (RCTs) related to TCEs published from inception until February 2023. Standardized mean differences (SMD) and 95% confidence intervals (CI) were used to determine the combined effects of the intervention, and the Cochrane risk-of-bias assessment tool and Review 5.2 software were used to assess methodological quality. The data were extracted and analyzed by the Stata15.0 random effects model.

RESULTS

Nineteen RCTs including 1315 participants were included in the analysis. The studies were found to be heterogeneous (I2 =86.2, P = 0.000), and thus a random effects model was used to combine the data. The results showed that traditional Chinese exercises had potentially beneficial effects on reducing pain (SMD =-0.66,95% CI [-1.08, -0.25], P = 0.002), improving sleep (SMD = -0.35,95% CI [-0.68,0. 01], P = 0.041) and relieving depression (SMD= -0.24,95% CI [-0.47, -0.02], P = 0.034) in FMS patients. However, no significant effects were found on improved quality of life (SMD =-0.20,95% CI [-0.48,0.09], P = 0.176).

CONCLUSIONS

TCEs can improve pain, sleep quality and depression in patients with FMS and are safe. However, they do not improve the quality of life significantly. Further large-scale, high-quality, and multi-center RCTs are required to verify the efficacy of TCEs.

Efficacy and safety of transcranial direct current stimulation in the treatment of fibromyalgia: A systematic review and meta-analysis

OBJECTIVES

To update a systematic review of the efficacy and safety of transcranial direct current stimulation (tDCS) for analgesia, for antidepressant effects, and to reduce the impact of fibromyalgia (FM), looking for optimal areas of stimulation.

METHODS

We searched five databases to identify randomized controlled trials comparing active and sham tDCS for FM. The primary outcome was pain intensity, and secondary outcome measures included FM Impact Questionnaire (FIQ) and depression score. Meta-analysis was conducted using standardized mean difference (SMD). Subgroup analysis was performed to determine the effects of different regional stimulation, over the primary motor cortex (M1), dorsolateral prefrontal cortex (DLPFC), opercular-insular cortex (OIC), and occipital nerve (ON) regions. We analyzed the minimal clinically important difference (MCID) by the value of the mean difference (MD) for an 11-point scale for pain, the Beck Depressive Inventory-II (BDI-II), and the Fibromyalgia Impact Questionnaire (FIQ) score. We described the certainty of the evidence (COE) using the tool GRADE profile.

RESULTS

Twenty studies were included in the analysis. Active tDCS had a positive effect on pain (SMD= -1.04; 95 % CI -1.38 to -0.69), depression (SMD= -0.46; 95 % CI -0.64 to -0.29), FIQ (SMD= -0.73; 95 % CI -1.09 to -0.36), COE is moderate. Only group M1 (SD=-1.57) and DLPFC (SD=-1.44) could achieve MCID for analgesia; For BDI-II, only group DLPFC (SD=-5.36) could achieve an MCID change. Adverse events were mild.

CONCLUSION

tDCS is a safe intervention that relieves pain intensity, reduces depression, and reduces the impact of FM on life. Achieving an MCID is related to the stimulation site and the target symptom.

Exploring the Relationship between Diamine Oxidase and Psychotropic Medications in Fibromyalgia Treatment, Finding No Reduction in Diamine Oxidase Levels and Activity except with Citalopram

Background: Histamine intolerance manifests when there is an imbalance between the production of histamine and the body's capacity to metabolise it. Within the gastrointestinal tract, diamine oxidase (DAO) plays a pivotal role in breaking down ingested histamine. Insufficient levels of DAO have been linked to various diseases affecting the respiratory, cardiovascular, nervous, muscular, and digestive systems; some of these symptoms are evidenced in fibromyalgia syndrome. This underscores the crucial role of DAO in maintaining the histamine balance and highlights its association with diverse physiological systems and health conditions. The management of fibromyalgia commonly involves the use of psychotropic medications; however, their potential interactions with DAO remain not fully elucidated. Methods: This study delved into the influence of various psychotropic medications on DAO activity through in vitro experiments. Additionally, we explored their impact on the human intestinal cell line Caco-2, examining alterations in DAO expression at both the mRNA and protein levels along with DAO activity. Results: Notably, the examined drugs-sertraline, pregabalin, paroxetine, alprazolam, and lorazepam-did not exhibit inhibitory effects on DAO activity or lead to reductions in DAO levels. In contrast, citalopram demonstrated a decrease in DAO activity in in vitro assays without influencing DAO levels and activity in human enterocytes. Conclusions: These findings imply that a collaborative approach involving psychotropic medications and DAO enzyme supplementation for individuals with fibromyalgia and a DAO deficiency could offer potential benefits for healthcare professionals in their routine clinical practice.

Fibromyalgia and risk of all-cause, specific mortality: A meta-analysis of observational studies

OBJECTIVES

To evaluate the risk of all-cause, specific mortality among patients with fibromyalgia, which is a controversial topic.

METHODS

We conducted a thorough search for cohort studies across the PubMed, Cochrane Library, and Embase databases, from their inception to 1 March 2023, using medical subject headings and relevant keywords. All data were meticulously analyzed using Stata statistical software version 16.0. The protocol was registered on PROSPERO (CRD42023402337).

RESULTS

After analyzing seven cohort studies involving 152 933 individuals published between 2001 and 2020, we found no clear evidence linking fibromyalgia or widespread pain to all-cause mortality risk (odds ratio [OR] 1.11, 95% confidence interval [CI] 0.81-1.53; I2  = 82.6%, p = .505). However, our subgroup analysis revealed that the risk of suicide was significantly higher in fibromyalgia patients compared with non-fibromyalgia patients (OR 5.39, 95% CI 2.16-13.43; I2  = 69.9%, p < .05).

CONCLUSIONS

Our research did not discover any proof indicating a link between fibromyalgia or widespread pain and all-cause mortality. However, it is worth noting that there may be a potential correlation between individuals with fibromyalgia or widespread pain and a higher likelihood of suicide. As we had a limited number of participants in our study, further research is necessary to thoroughly investigate the relationship between these factors.

The Efficacy and Safety of Telerehabilitation for Fibromyalgia: Systematic Review and Meta-analysis of Randomized Controlled Trials

BACKGROUND

Fibromyalgia is a chronic pain syndrome characterized by persistent and widespread musculoskeletal pain. Telerehabilitation is a promising treatment for patients with fibromyalgia through long-term monitoring, intervention, supervision, consultation, and education.

OBJECTIVE

This study aimed to perform a comprehensive systematic review and meta-analysis of the efficacy and safety of telerehabilitation in patients with fibromyalgia.

METHODS

Randomized controlled trials (RCTs) related to fibromyalgia and telerehabilitation were systematically searched in the PubMed, PEDro, Cochrane Library, ScienceDirect, Ovid MEDLINE, Embase, and Web of Science databases from inception to November 13, 2022. Two independent researchers screened the literatures and evaluated the methodological quality using the Cochrane Risk of Bias Tool. The outcome measures included the Fibromyalgia Impact Questionnaire scale, pain intensity, depression, pain catastrophizing, quality of life (QoL), and adverse events. Pooled effect sizes were calculated by Stata SE 15.1; a fixed effects model was used when I²<50%, whereas a random effects model was used when I²≥50%.

RESULTS

A total of 14 RCTs with 1242 participants were included in this meta-analysis. The pooled results indicated that the telerehabilitation improved the Fibromyalgia Impact Questionnaire score (weighted mean difference -8.32, 95% CI -11.72 to -4.91; P<.001), pain intensity (standardized mean difference [SMD] -0.62, 95% CI -0.76 to -0.47; P<.001), depression levels (SMD -0.42, 95% CI -0.62 to -0.22; P<.001), pain catastrophizing (weighted mean difference -5.81, 95% CI -9.40 to -2.23; P=.001), and QoL (SMD 0.32, 95% CI 0.18 to 0.47; P<.001) in patients with fibromyalgia compared to control interventions. Only 1 RCT reported a mild adverse event of telerehabilitation; the other 13 RCTs did not mention this.

CONCLUSIONS

Telerehabilitation can improve the symptoms and QoL of fibromyalgia. However, the safety of telerehabilitation remains uncertain due to the lack of sufficient evidence for the management of fibromyalgia. More rigorously designed trials are needed in the future to verify the safety and efficacy of telerehabilitation in fibromyalgia.

TRIAL REGISTRATION

PROSPERO CRD42022338200; https://tinyurl.com/322keukv.

Wireless Peripheral Nerve Stimulation for The Upper Limb: A Case Report

Peripheral neuro-stimulation (PNS) has been proved to be effective for the treatment of neuropathic pain as well as other painful conditions. We discuss two approaches to PNS placement in the upper extremity. The first case describes a neuropathic syndrome after the traumatic amputation of the distal phalanx of the fifth digit secondary to a work accident with lack of responsiveness to a triple conservative therapy. An upper arm region approach for the PNS was chosen. The procedure had a favorable outcome; in fact, after one month the pain symptoms were absent (VAS 0) and the pharmacological therapy was suspended. The second case presented a patient affected by progressive CRPS type II in the sensory regions of the ulnar and median nerve in the hand, unresponsive to drug therapy. For this procedure, the PNS device was implanted in the forearm. Unfortunately, in this second case the migration of the catheter affected the effectiveness of the treatment. After examining the two cases in this paper, we changed our practice and suggest the implantation of PNS for radial, median and/or ulnar nerve stimulation in the upper arm region, which has significant advantages over the forearm region.