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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 7 (1993), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We conducted a double-blind study comparing two dosage regimens of a prokinetic drug, cisapride (10 mg q.d.s. and 20 mg b.d.), with a low dose of a H2 receptor antagonist (150 mg ranitidine b.d.) in the treatment of 155 patients with reflux oesophagitis as determined by endoscopy. The active treatment took 8 to 12 weeks depending on whether complete healing was found at endoscopy. Improvement in oesophagitis grades from baseline to endpoint was observed in 68% of patients in the 10 mg cisapride q.d.s. group, 83 % in the cisapride 20 mg b.d. group and 81% in the ranitidine group (N.S.). At endpoint, the percentages of endoscopically cured patients with initial grades I or II were 52% for 10 mg cisapride q.d.s., 71% for 20 mg cisapride b.d. and 80% for ranitidine (N.S.). The proportional improvement of the overall reflux symptom score (60%) also showed no significant difference between the three groups. In the treatment of mild reflux oesophagitis (grades I and II) similar results can be expected from 20 mg cisapride b.d. and 150 mg ranitidine b.d. As the results of the two dosage regimens of cisapride were not different, the 20 mg twice daily regimen is preferred because it will improve patient compliance. It is concluded that in reflux oesophagitis grades I and II, the efficacy of 20 mg cisapride b.d. and 150 mg ranitidine b.d. are broadly similar.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : The presence of the gastric pathogen, Helicobacter pylori influences acid suppression by proton pump inhibitors and treatment outcome in patients with gastro-oesophageal reflux disease.Aim : To determine the influence of H. pylori infection on effectiveness of rabeprazole in primary and secondary care patients with gastro-oesophageal reflux disease.Methods : Patients from primary and secondary care centres with uninvestigated gastro-oesophageal reflux disease (based on symptoms only) and investigated gastro-oesophageal reflux disease (endoscopically confirmed oesophagitis or endoscopy-negative reflux disease) were tested for H. pylori and treated with rabeprazole 20 mg once daily for 4–8 weeks in a non-randomized, multicentre, open-label study. Primary end-point for treatment effectiveness was complete resolution of both heartburn and acid regurgitation at 4–8 weeks; secondary end-point was quality of life as registered with the Psychological General Well-being Index.Results : Data of 1787 patients could be analysed; mean duration of treatment was 36.3 days. At the evaluation visit 76.9% were heartburn-free, 77.7% regurgitation-free and 71% had complete symptom resolution. Overall Psychological General Well-being Index scores improved accordingly. Treatment was equally effective in patients with or without H. pylori infection, but more effective in patients with oesophagitis when compared with symptomatic gastro-oesophageal reflux disease.Conclusions : The effectiveness of rabeprazole in gastro-oesophageal reflux disease is not affected by the presence of H. pylori infection.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 16 (1971), S. 1853-1854 
    ISSN: 0031-9422
    Keywords: Valeriana officinalis ; Valerianaceae ; essential oil ; eugenyl isovalerate ; isoeugenyl isovalerate.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 16 (1977), S. 1853-1854 
    ISSN: 0031-9422
    Keywords: Valeriana officinalis ; Valerianaceae ; essential oil ; eugenyl isovalerate ; isoeugenyl isovalerate.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 3 (1981), S. 810-814 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A statistical comparison between the soxhlet extraction and the percolation extraction of (iso)valtrate from severalValeriana preparations did not show a significant difference with regard to their accuracy. Because the soxhlet extraction was the least laborious, this procedure was preferred. Thereafter a quantitative determination of (iso)valtrate was performed using TLC and HPLC. The standard deviation of the values obtained by HPLC was found to be significantly smaller compared to the values obtained by TLC. Furthermore, the HPLC procedure turned out to be less laborious.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 4 (1982), S. 21-24 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In this study valtrate and isovaltrate, two isomeric valepotriates present in variousValeriana species, were separated on a preparative scale with a Waters preparative Liquid Chromatography/500 a system. A rapid separation was achieved with the solvent methylene chloriden-propanol-acetone (99 + 0.5 + 0.5). Extensive use of the recycle mode of the instrument resulted in a considerable reduction of the amount of solvent used, without affecting the purity and the recovery (〉 90%) of the separated components. With the method presented in this communication 1 gram of a mixture of valtrate and isovaltrate was separated in 20 minutes using 2.1 liters of solvent.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 443-449 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The pharmacological action of Valerian is mainly ascribed to the so-called valepotriates, which were first shown to be present in Valerian ByThies (1966). An investigation into the composition of the essential oil of subterranean parts of a commercial Valerian strain has been carried out in order to obtain a clearer insight into its possible contribution to the pharmacological action of this plant. During this investigation, mainly performed by means ofGc-Ms, 69 compounds could be identified of which 45 had not been reported to be present in the essential oil of European Valerian. Three types of essential oil could be distinguished in a comparative investigation of a number of samples of root material from individual plants, namely: Type A: 2.4–4.9% elemol, 6.2–8.7% valeranone and 13.4–15.9% valerenal; no ‘M = 238’ and ‘M = 280’. Type B: 9.8–11.7% elemol, 10.3–12.0% valerenal; no valeranone, ‘M = 238’ and ‘M = 280’. Type C: 1.9–2.8% elemol, 16.2–18.1% valeranone, 9.3–10.3% ‘M = 238’, 3.3–3.9% valerenal and 3.3–3.8% ‘M = 280’. ‘M = 238’ and ‘M = 280’ are presumably a kessyl alcohol and its corresponding acetate respectively. From the results obtained the conclusion can be drawn that, if the essential oil of Valerian plays a role in the pharmacological action of the crude drug, it depends upon the composition of the essential oil. An extended investigation has to be carried out in order to define the original chemotypes ofValeriana officinalis L. s.l.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 956-964 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Valepotriates are considered as one of the main groups of compounds responsible for the sedative activity of Valeriana preparations. An extraction method for valepotriates is given and the isolation of (iso) valtrate, didrovaltrate andIvhd-valtrate by means of column chromatography on silicagel was shown to be a fast method without giving much decomposition. Toluene-ethyl acetate-methyl ethyl ketone (80+15+5) as a mobile phase gives an excellent indication of the presence of the various valepotriates in Valeriana preparations. For the quantitative determination of valepotriates a direct spectrophotometric scanning onTlc plates was compared with aHplc
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The synthesis of the semi-rigid imipramine analogue 2-(N,N-dimethylaminomethylene)-2,3,7,8-tetrahydro-1H-quino [1,8-ab][1]-benzazepine is described. The compound was pharmacologically evaluated in a number of generalin vivo screening tests for antidepressive activity. From these preliminary tests the compound appeared to show an imipramine-like activity. However, it did not have an effect on the noradrenaline depletion by 4,α-dimethyl-m-tyramine. These results are discussed on the basis of the conformational requirements determining the pharmacological profile of antidepressants.
    Type of Medium: Electronic Resource
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