Cost-utility and Physiological Effects of LDN in Patients With Fibromyalgia (INNOVA)
Randomized Controlled Trial
About this trial
This is an interventional treatment trial for Randomized Controlled Trial
Eligibility Criteria
General Inclusion Criteria:
- Female between 18 and 70 years old
- Patients diagnosed of FM according to ACR 2016 criteria
- Chronic widespread pain for at least 6 months ranked ≥ 4 out of 10;
- Understand Spanish;
- Written informed written consent;
General Exclusion Criteria:
- Treatment with opiates in last 3 months;
- Diagnosis of severe medical/psychiatric disorders (e.g. cancer, severe depression, psychotic disorder, schizophrenia);
- Being pregnant (or planning a pregnancy during the study period) or breastfeeding;
- Known allergy to naltrexone or naloxone;
- Hematological disorders;
- Abnormal hepatic function;
- Taking anticoagulant medication;
- Alcohol consume during the study period
- Participation in other clinical trials;
Additional inclusion criteria for biomarker sub-study:
Right-handed (for the neuroimaging tests)
Additional exclusion criteria for biomarker sub-study:
Comorbid rheumatologic illnesses (e.g. rheumatoid arthritis, lupus); fever (> 38ºC) or infection in the last 2 weeks; vaccination in the last 4 weeks; Take drugs with anti-inflammatory effects in the 72h prior to blood / neuroimaging; taking cortisone or anti-cytokine therapy; needle phobia; inability to be scanned (due to claustrophobia, metal implants, pacemakers, etc.); Body Mass Index (BMI) > 36 kg/m2; consumption of > 8 units of caffeine per day; smoking > 10 cigarettes/day; acute pain not-related to FM on the day of the scan (e.g. headache, back pain).
Sites / Locations
- Parc Sanitari Sant Joan de Déu (PSSJD)
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Low-Dose-Naltrexone (LDN)
Placebo
The LDN treatment will consist of one 4.5 mg naltrexone tablet (lactose-free) taken daily for 12 months before going to sleep.
The control group will take the placebo daily (a film-coated tablet, identical to the LDN, filled with a lactose-free excipient), for 12 months, following the same guidelines.