Drugs online research references
Am J Med. 1986 Sep 29;81(3A):7-14.
The clinical syndrome of fibrositis.
Wolfe F.
Fibrositis is a disorder of musculoskeletal pain and aching with at least a five to one female-to-male ratio. It is most commonly seen between the ages of 40 and 60, and has a prevalence in the clinic of 6 to 15 percent. Its most common mode of presentation involves generalized musculoskeletal pain and aching, but articular pain, axial skeletal pain, myalgias, and neurovascular complaints sometimes predominate. All patients have multiple areas of local tenderness called "tender points" that are easily identified during physical examination, and are diagnostic. Essential symptoms of fibrositis are disturbed sleep, morning stiffness, and fatigue. Additional rheumatic symptoms include subjective swelling, paresthesias, and numbness. Headaches and irritable bowel syndrome are common nonrheumatic complaints. Modest improvement follows treatment by tricyclic agents such as low-dose cyclobenzaprine and amitriptyline, by physical measures, and by reduction in stress. Remission occurs in 20 percent of patients, but is generally short-lived.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3464212&dopt=Abstract
Clin Chem. 1987 Jun;33(6):819-20.
Detection of interference by cyclobenzaprine in liquid-chromatographic assays of tricyclic antidepressants.
Puopolo PR, Flood JG.
We evaluated a technique for detecting cyclobenzaprine interference with liquid-chromatographic assays for tricyclic antidepressants. The technique involves dual-wavelength absorbance monitoring of the column effluent at 214 and 254 nm. Ratios of analyte peak heights at each wavelength are used to check for the presence of co-eluting interferences. With this technique, one can detect interference with an amitriptyline assay caused by 10 micrograms of cyclobenzaprine per liter.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3594825&dopt=Abstract
Int J Cancer. 1975 Nov 15;16(5):787-97.
Epoxides metabolically produced from some known carcinogens and from some clinically used drugs. I. Differences in mutagenicity.
Glatt HR, Oesch F, Frigerio A, Garattini S.
The epoxide metabolites of two clinically used drugs and an experimental psychotropic agent, carbamazepine 10,11-oxide, cyproheptadine 10,11-oxide and cyclobenzaprine 10,11-oxide, were fully devoid of any mutagenic activity under conditions where K-region-epoxide metabolites of some known carcinogens, such as benzo(a)pyrene, proved to be potent frameshift mutational agents for Salmonella typhimurium TA 1537 and TA 1538. All epoxides tested were non-mutagenic for TA 1535, designed to detect substitution mutations. The 10,11-epoxides of the three drugs, carbamazepine, cyproheptadine and cyclobenzaprine, were not cytotoxic to any of the bacterial tester strains used, precluding that mutagenicity might have been overshadowed by cytotoxicity. When the mutagen, precursor, benzo(a)pyrene, was incubated together with TA 1537 and a mammalian microsomal preparation in the presence of a system generating the co-factor necessary for mono-oxygenase activity, activation to mutagenic species was observed which was dramatically increased in the presence of a potent epoxide hydratase inhibitor, 1,1,1-trichloropropene 2,3-oxide, suggesting epoxide(s) as the (or one of the) mutagenically active species metabolically produced in situ. None of these effects was observed with the three medical drugs. Moreover, the observation that the alkene oxide 4-phenylstyrene 7,8-oxide is mutagenic to the two strains TA 1537 and TA 1538 but the K-region arene oxide derived from 7,12-dimethylbenz(a)anthracene is inactive for the latter strain indicates that epoxidation of an aromatic double bond of a polycyclic hydrocarbon is neither a necessary nor a satisfying condition for frameshift mutagenesis to occur.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1102464&dopt=Abstract
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