Cannabinoids/agonists; Dronabinol/analogs & derivatives; Pain Threshold/drug effects; Pain/drug therapy; Analgesics/pharmacokinetics; Analgesics/therapeutic use; Animals; Benzoxazines; Catalepsy/drug therapy; Cell Line; Chromatography/methods; Cricetinae; Cricetulus; Cyclohexanols/pharmacokinetics; Cyclohexanols/therapeutic use; Disease Models, Animal; Dose-Response Relationship, Drug; Dronabinol/chemistry; Dronabinol/pharmacokinetics; Dronabinol/therapeutic use; Drug Interactions; Freund's Adjuvant; Guanosine 5'-O-(3-Thiotriphosphate)/pharmacokinetics; Humans; Hypothermia/drug therapy; Inflammation/chemically induced; Inflammation/complications; Inflammation/metabolism; Ligation/methods; Male; Morpholines/therapeutic use; Motor Activity/drug effects; Naphthalenes/therapeutic use; Pain/etiology; Pain/metabolism; Pain Measurement/drug effects; Pain Measurement/methods; Pain Threshold/physiology; Radioligand Assay/methods; Rats; Rats, Wistar; Rotarod Performance Test/methods; Sciatic Neuropathy/complications; Sulfur Isotopes/pharmacokinetics; Time Factors; Tritium/pharmacokinetics