CBD (Cannabidiol)/THC (Tetrahydrocannabinol) Solution as a Pharmacological Strategy for Patients With Fibromyalgia

• Status: Not yet recruiting
• Trial end date: 2022-11-20

Summary

Fibromyalgia is considered a chronic pain syndrome, non-inflammatory, of unknown etiology, which manifests itself in the musculoskeletal system in up to 2.5% of the general population, predominantly in females, mainly between 35 and 44 years old, having a direct impact on the quality of life of their patients (JUNIOR; GOLDENFUM; SIENA, 2012; HEYMANN et al., 2017). In 1990, eighteen (18) specific sites were defined as tender points which are used to better diagnose fibromyalgia (WOLFE et al., 2010). Due to its clinical and exclusion diagnosis, treatment usually starts late, which allows the progression of symptoms and corroborates its low efficiency in the long term (DE SOUSA BRAZ et al., 2011). Due to the ineffective results and significant side effects that conventional treatment with drugs such as antidepressants, analgesics and anti-inflammatory drugs can provide, patients, physicians and researchers are looking for new main or adjuvant treatments, pharmacological and non-pharmacological (DE SOUSA BRAZ et al. al., 2011). In this context, it has been seen that the use of Cannabis sativa as a therapeutic option in fibromyalgia is promising, especially in reducing the pain caused by the disease and also the adjuvant symptoms, such as depression and sleep disorders (YASSIN; ORON; ROBINSON, 2019). This result must occur due to the action of cannabinoids, such as CBD and THC, on cannabinoid receptors distributed in peripheral nerves, spinal cord and supraspinal region, sites responsible for the reception, transmission and perception of pain (STE-MARIE et al., 2012). Currently, cannabinoids are considered safe analgesics with considerable efficacy, which demonstrates potential as a therapeutic option in the treatment of chronic pain, particularly in patients refractory to other treatments (HAUSER et al., 2018). In addition to its action on the painful mechanisms of fibromyalgia, the antidepressant effects of Cannabis are of great value in the treatment of fibromyalgia. These effects are explained by the modulation on serotonin 5-HT1A receptors, which has its effect exerted especially by CBD (ESPEJO-PORRAS et al., 2013).

Considering that research has reported the effects of phytocannabinoids on the painful symptoms of fibromyalgia (HAUSER et al., 2018), the hypotheses of the present study are:

Primary hypothesis: The dose-response curve and ED50 for the primary outcome, which is related to pain intensity, will be determined in the dose range between 0.1 and 10mg/day. The sensation of pain will be significantly reduced in participants receiving oral solution containing CBD/THC 10mg/day compared to those who will receive placebo.

Secondary hypothesis: There will be a reduction in pain catastrophizing, as well as an improvement in the acceptance and action rate related to pain, a reduction in depression, an improvement in sleep latency and quality, a reduction in insomnia and an increase in the quality of life in patients treated with oral solution containing CBD/THC 10mg/day compared to those receiving placebo.

Supporting Hypothesis: The tested CBD/THC solution will show efficacy and safety with no serious adverse effects.

• Phase: Phase 2/Phase 3

Details

• Lead Sponsor: FG Brasil LTDA
• Collaborator: 3F Clinical Trials LTDA
• Treatments: Cannabidiol; Dronabinol