M J Koot, F N IJdenberg, R M Stuurman, J Poell, L J Bras, J J Langemeijer, L Lie-A-Huen
{"title":"High pressure liquid chromatographic analysis of the serum concentration of cefuroxime after an intravenous bolus injection of cefuroxime in patients with a coronary artery bypass grafting.","authors":"M J Koot, F N IJdenberg, R M Stuurman, J Poell, L J Bras, J J Langemeijer, L Lie-A-Huen","doi":"10.1007/BF01970173","DOIUrl":"https://doi.org/10.1007/BF01970173","url":null,"abstract":"<p><p>A simple reversed-phase high pressure liquid chromatographic method was developed for the determination of cefuroxime in the serum of patients undergoing coronary artery bypass grafting. The serum was cleaned up with a 3.3% solution of perchloric acid in water. Cefalexine was used as an internal standard. Detection was made by a UV multi-wavelength detector. The optimum wavelength for cefuroxime is 275 nm. The absolute recovery of this method was 90.9%; the limit of quantification was 0.7 mg/l. This analytical method was used in a study to investigate the cefuroxime serum concentration--time curves in 26 patients undergoing coronary artery bypass grafting. It was found that one single dose is sufficient to obtain effective serum concentrations.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 6","pages":"360-4"},"PeriodicalIF":0.0,"publicationDate":"1992-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01970173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12644910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessment of trace element compatibility in total parenteral nutrition infusions.","authors":"M C Allwood, M Greenwood","doi":"10.1007/BF01977621","DOIUrl":"https://doi.org/10.1007/BF01977621","url":null,"abstract":"<p><p>The application of X-ray energy dispersive spectroscopy to detect elements collected from TPN mixtures on membrane filters has been investigated. Many simple total parenteral nutrition mixtures prepared aseptically in large bags can be stored for extended periods. Trace elements are normally excluded from such bags, because not enough is known about their long-term stability and compatibility in total parenteral nutrition mixtures. Assessing the compatibility of many trace elements by conventional methods that rely on detecting concentration changes is extremely difficult. Analysis of precipitates from total parenteral nutrition mixtures confirmed that the proposed method was capable of identifying a number of elements from the mixture in complex precipitates, including calcium, phosphorus, iron, copper and selenium.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"321-4"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977621","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"1st European Congress of Pharmaceutical Sciences. Amsterdam, The Netherlands, 7-9 October 1992. Abstracts.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5 Suppl F","pages":"F1-73"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12530331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dideoxynucleoside therapy for HIV infection.","authors":"D M Burger, J H Beijnen","doi":"10.1007/BF01977615","DOIUrl":"https://doi.org/10.1007/BF01977615","url":null,"abstract":"","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"289"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977615","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Catecholamines in critical care. The commonly used catecholamines: receptor and clinical profile, indications and dosages.","authors":"F W Santman","doi":"10.1007/BF01977616","DOIUrl":"https://doi.org/10.1007/BF01977616","url":null,"abstract":"<p><p>The pharmacology, pattern of receptor activation and resulting clinical impact of the currently most widely used intravenous catecholamines are reviewed. A brief physiological description of the alpha, beta and dopaminergic receptors is used in order to explain the clinical effects of norepinephrine, epinephrine, isoproterenol, dopamine, dobutamine and dopexamine. Each drug is discussed separately according to receptor profile, indications, dosages and current application in critical care. Tables are provided for comparison of relative strengths of these drugs regarding receptor activation, haemodynamic effects, organ perfusion and recommended dosages. The use of combinations of catecholamines to meet a variety of circulatory demands is commented upon.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"290-6"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T B Vree, E W Van Ewijk-Beneken Kolmer, E W Wuis, Y A Hekster
{"title":"Capacity-limited renal glucuronidation of probenecid by humans. A pilot Vmax-finding study.","authors":"T B Vree, E W Van Ewijk-Beneken Kolmer, E W Wuis, Y A Hekster","doi":"10.1007/BF01977622","DOIUrl":"https://doi.org/10.1007/BF01977622","url":null,"abstract":"<p><p>Probenecid shows dose-dependent pharmacokinetics. When in one volunteer the dose is increased from 250 to 1,500 mg orally, the t1/2 increased from 3 to 6 h. The Cmax was 14 micrograms/ml with a dosage of 250 mg, 31 micrograms/ml with 500 mg, 70 micrograms/ml with 1,000 mg and 120 micrograms/ml with 1,500 mg. The tmax remained 1 h for all four dosages. The AUC/dose ratio increased with the dose, indicating nonlinear elimination. The total body clearance declined from 64.5 ml/min for 250 mg to 26.0 ml/min for 1,500 mg. The renal clearance of probenecid remained constant, 0.6-0.8 ml/min. Protein binding of probenecid is high (91%) and independent of the dose. The phase I metabolites show lower protein binding values (34-59%). The protein binding of probenecid glucuronide in vitro (spiked plasma) is 75%. Probenecid is metabolized by cytochrome P-450 to three phase I metabolites. Each of the metabolites accounts for less than 10% of the dose administered; the percentage recovered in the urine is independent of the dose. The main metabolite probenecid glucuronide is only present in urine and not in plasma. The renal excretion rate--time profile of probenecid glucuronide shows a plateau value of approximately 700 micrograms/min (46 mg/h) with acidic urine pH. The duration of this plateau value depends on the dose: 2 h at 500 mg, 10 h at 1,000 mg and 20 h at 1,500 mg. It is demonstrated that probenecid glucuronide must be formed in the kidney during its passage of the tubule. The plateau value in the renal excretion rate of probenecid value reflects its Vmax of formation.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"325-31"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977622","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G Van den Brink, C W Bollen, O E Van de Wall, L J Hoeve, A J Porsius
{"title":"A drug use review study in patients with obstructive lung disease. Assessment of the quality of drug therapy.","authors":"G Van den Brink, C W Bollen, O E Van de Wall, L J Hoeve, A J Porsius","doi":"10.1007/BF01977619","DOIUrl":"https://doi.org/10.1007/BF01977619","url":null,"abstract":"<p><p>This study presents the results of an analysis of the pharmacy records of 778 patients with asthma or chronic obstructive lung diseases. The high percentage of patients taking oral corticosteroids was striking. Inhaled beta-agonists for use as needed have been prescribed to only a minority of patients using these agents. Only half of the patients on beta-agonists used inhaled corticosteroids prophylactically. Drug interactions capable of causing changes in plasma theophylline concentrations appeared in only a small number of patients. The results from studies like the one presented here can provide valuable data to be used for further discussion between physicians and pharmacists about rational drug therapy.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"311-5"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12532004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Drug transport across the blood--brain barrier. I. Anatomical and physiological aspects.","authors":"J B Van Bree, A G De Boer, M Danhof, D D Breimer","doi":"10.1007/BF01977618","DOIUrl":"https://doi.org/10.1007/BF01977618","url":null,"abstract":"<p><p>This review describes various aspects of the transport of drugs across the blood-brain barrier and comprises three parts. In this first part, the anatomical and physiological aspects of blood-brain transport are discussed. It appears that the blood-brain barrier has an anatomical basis at the endothelium of the capillary wall. This endothelium is characterized by the presence of very tight junctions. As a result, the transport by passive diffusion of drugs with a low lipophilicity, is restricted. For certain classes of closely related relatively hydrophilic compounds, however, the presence of specialized carrier systems has been demonstrated which may facilitate transport. Also evidence is presently available, that the permeability of the blood-brain barrier may be under active regulatory control. It is expected that improved knowledge of the anatomical and physiological aspects of the blood-brain barrier and its regulation will provide a scientific basis for the development of strategies to improve the transport of drugs into the central nervous system.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"305-10"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977618","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The comprehensiveness of Medline and Embase computer searches. Searches for controlled trials of homoeopathy, ascorbic acid for common cold and ginkgo biloba for cerebral insufficiency and intermittent claudication.","authors":"J Kleijnen, P Knipschild","doi":"10.1007/BF01977620","DOIUrl":"https://doi.org/10.1007/BF01977620","url":null,"abstract":"<p><strong>Objective: </strong>To assess the comprehensiveness of Medline and Embase computer searches for controlled trials.</p><p><strong>Design: </strong>Comparison of articles found after an exhaustive search of the literature with the yield of a Medline or Embase search. This was performed for controlled clinical trials on the efficacy of three interventions: homoeopathy, ascorbic acid for common cold, and ginkgo biloba for intermittent claudication and cerebral insufficiency. The number of controlled trials found by exhaustive search of the literature was 107, 61 and 45, respectively.</p><p><strong>Results: </strong>For homoeopathy, ascorbic acid and ginkgo the proportion of all trials found by Medline was 17%, 36% and 31% respectively and for Embase 13%, 25% and 58% respectively. After checking of the references in the Medline articles 44%, 79% and 76% of all trials were identified. After checking of the references in the Embase articles 42%, 72% and 93% of all trials were identified. About 20% of the articles was not correctly indexed. Of the best trials 68%, 91% and 83% could be found with Medline and 55%, 82% and 92% of the best trials were identified through Embase.</p><p><strong>Conclusions: </strong>For the topics mentioned, Medline and Embase searches are sufficient to get an impression of the evidence from controlled trials, but only if references in the articles are followed for further evidence. If one wants to get a more complete picture, additional search strategies make sense. Of course, this picture may be different for other topics.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"316-20"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977620","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R M Franssen, P L Meenhorst, C H Koks, J H Beijnen
{"title":"Didanosine, a new antiretroviral drug. A review.","authors":"R M Franssen, P L Meenhorst, C H Koks, J H Beijnen","doi":"10.1007/BF01977617","DOIUrl":"https://doi.org/10.1007/BF01977617","url":null,"abstract":"<p><p>In this article the literature about didanosine, an antiretroviral drug, is reviewed. The mechanism of action, biochemical pharmacology, pharmacokinetics, and clinical results of phase-I trials are discussed. Serious adverse effects such as pancreatitis and peripheral neuropathy have occurred in these trials. An antiretroviral effect was observed in terms of an increase in CD4+ lymphocytes and a decrease in p24 antigen levels in HIV-infected individuals. Didanosine seems to be a promising drug against HIV infection, but knowledge about its clinical efficacy is scanty.</p>","PeriodicalId":19804,"journal":{"name":"Pharmaceutisch weekblad. Scientific edition","volume":"14 5","pages":"297-304"},"PeriodicalIF":0.0,"publicationDate":"1992-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF01977617","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12607931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}