2-AG	2-ArachidonoylGlycerol
AA	Arachidonic Acid
ACR	American College of Rheumatology
ACTH	Adrenocorticotropic hormone
AEA	N-arachidonoylethanolamine
BDNF	Brain-Derived Neurotrophic Factors
CB1	Cannabinoid Receptor 1
CB2	Cannabinoid Receptor 2
CBD	Cannabidiol
CNS	Central Nervous System
EA	Electro-Acupuncture
ESS	Extent of Somatic Symptoms
FIQ	FM Impact Questionnaire
FIQR	FM Impact Questionnaire Revised version
FM	Fibromyalgia
FS	Fibromyalgianess Scale
GABA	Gamma-Aminobutyric Acid
GRADE	Grading of Recommendations, Assessment, Development, and Evaluation
HBOT	Hyperbaric Oxygen Therapy
ICD-11	International Classification of Diseases
IL-1β	Interleukin 1 beta
IL-6	Interleukin 6
MA	Manual Acupuncture
PEA	Palmitoylethanolamide
PFM	Primary FM
ROS	Reactive Oxygen Species
SIQ	Symptom Impact Questionnaire
SFM	Secondary FM
SNRIs	Serotonin and Norepinephrine Reuptake Inhibitors
SSRIs	Serotonin Selective Reuptake Inhibitors
SSS	Symptom Severity Scale
TCAs	Tricyclic Antidepressant
TNFα	Tumor necrosis factor alpha
VAS	Visual Analog Scale
WPI	Widespread Pain Index
Δ9-THC	Delta 9-tetrahydrocannabinol