Drugs online research references
Am J Hosp Pharm. 1990 Sep;47(9):2031-4.
Promotion of extended-release niacin tablets at a Veterans Affairs medical center.
Wu FF, Gray DR.
Inpatient Pharmacy Department, Kaiser Permanente, Fontana, CA 92335.
A program to modify the prescribing of antilipemic agents by promoting the use of extended-release niacin tablets is described. Between December 1987 and August 1988, pharmacists at a 1188-bed Veterans Affairs medical center observed a large increase in the number of outpatient prescriptions for antilipemic agents. In an attempt to control costs, a program to promote the use of extended-release niacin tablets for treating hyperlipemia was conducted during August and September 1988. Various educational materials on niacin were distributed to physicians. A display on therapy of hyperlipemia was featured at the monthly drug fair, and articles on niacin were presented during a journal club meeting of ambulatory-care clinicians. Pharmacists succeeded in having extended-release niacin tablets placed on the formulary in September. Data on the number of prescriptions filled for antilipemic agents were collected before and after the niacin promotional program. The number of prescriptions filled for extended-release niacin 500-mg tablets increased steadily during a six-month study period after the program ended; the number of prescriptions filled for regular niacin decreased by 50%. As prescribing of extended-release niacin increased, prescribing of colestipol, gemfibrozil, and probucol declined. The promotional program was well received by most of the medical staff. A program of education and formulary management successfully changed physician prescribing habits for antilipemic agents.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2220857&dopt=Abstract
J Clin Pharmacol. 1993 Jan;33(1):35-9.
Effect of gemfibrozil on fatty acids in lipid fractions of plasma from patients with hypertriglyceridemia.
Tavella M, Corder CN, McConathy W.
Clinical Pharmacology Program, Oklahoma Medical Research Foundation, Oklahoma City 73104-5046.
The fatty acid composition of plasma triglycerides, phospholipids, and cholesterol esters have been studied during gemfibrozil (G)-induced lipid-lowering treatment in six patients with hypertriglyceridemia. Gemfibrozil caused significant plasma triglyceride reductions from 776 +/- 573 to 226 +/- 82 mg/dL (P < .001). Gemfibrozil therapy also caused significant changes in the plasma lipid fatty acid composition, mainly by increasing palmitoleic acid (16:1) in triglycerides (2.1-5.6%) and cholesterol esters (2.2-3.7%), concomitant with the significant decrease in the content of the linoleic acid (18:2) in phospholipids (20.1-16.0%) and triglycerides (18.0-15.2%). The ratio of unsaturated fatty acids (20:3 + 20:4/18:2) was increased in the phospholipid fraction. These findings support a G effect on the desaturation of fatty acids in patients with hypertriglyceridemia. Because fatty acid composition was significantly altered by G, those biologic systems dependent on the pattern of fatty acids may be modified in clinical important ways.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8429111&dopt=Abstract
Br J Pharmacol. 1995 Oct;116(3):2067-75.
Differential effects of fibrates on the acyl composition of microsomal phospholipids in rats.
Vazquez M, Munoz S, Alegret M, Adzet T, Merlos M, Laguna JC.
Dept. Farmacologia y Quimica Terapeutica, Facultad de Farmacia, Nucleo Universitario de Pedralbes, Barcelona, Spain.
1. The time-course and comparative effects of treatment with clofibrate (CFB), bezafibrate (BFB), and gemfibrozil (GFB) on the acyl composition of the main microsomal phospholipids, i.e. phosphatidylcholine and phosphatidylethanolamine, have been studied in male Sprague-Dawley rats. 2. The administration of the three fibrates caused a strong peroxisomal induction and a hypolipidaemic effect. Concerning the changes in acyl composition, CFB and BFB behaved in a similar way, with differences which could be attributed to their different potency as peroxisome inducers, whereas GFB showed a somewhat distinct profile. 3. The three drugs increased the relative content of palmitic, palmitoleic and oleic acids, whereas the levels of stearic acid and also those of long chain, highly unsaturated fatty acids docosatetraenoic, docosapentaenoic and docosahexaenoic acids were reduced. In general, these effects appeared from the first day of treatment and were highly correlated with peroxisomal proliferation. In addition, they were more evident in the phosphatidylcholine than in the phosphatidylethanolamine fraction. 4. Fibrates increased total monounsaturated fatty acids, whereas a decrease in total polyunsaturated fatty acids in the phosphatidylcholine fraction was observed in CFB- and BFB-, but not in GFB-treated rats. Clear differences appeared between CFB and BFB on the one hand, and GFB on the other when the influence of fibrate treatment on the molar percentages of linoleic, eicosatrienoic, arachidonic and mead acids was analyzed. 5. GFB increased linoleic acid content in phosphatidylethanolamine, whereas CFB and BFB decreased its level in both phospholipid fractions. In contrast, CFB and BFB enhanced eicosatrienoic and mead acids in both fractions and arachidonic acid in phosphatidylethanolamine, whereas GFB had practically no effect.
online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8640347&dopt=Abstract
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