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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 7 (1959), S. 483-486 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0920-9964
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Schizophrenia Research 2 (1989), S. 39 
    ISSN: 0920-9964
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 11 (1997), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Combined treatment using an acid-inhibiting drug with antibiotics can cure Helicobacter pylori infection. However, eradication rates are highly variable, especially if a proton pump inhibitor is used with amoxycillin. Therefore it is important to define factors/predictors of the clinical outcome. Methods: In a single-blind study, 60 H. pylori-positive patients prospectively matched for diagnosis (erosive gastritis, duodenal and gastric ulcer), age (above and below 50 years) and smoking habits were randomly treated (each group n = 20) for 2 weeks with amoxycillin (1 mg b.d.) and either omeprazole (20 mg b.d.), lansoprazole (30 mg b.d.) or ranitidine (300 mg b.d.). Intragastric pH and plasma levels of the administered drugs were monitored over a dosing interval of 12 h. Results: The overall eradication rates were 45% (intention-to-treat, ITT, 27/60) or 47% (per protocol 27/58); they did not differ (ITT) between omeprazole (50%), lansoprazole (40%) and ranitidine (45%). Median pH and time at which intragastric pH was above 4 was slightly lower for ranitidine (4.0 ± 1.7; 51 ± 25%) than for omeprazole (5.4 ± 1.1; 77 ± 25%; P 〈 0.05) or lansoprazole (4.4 ± 1.6; 68 ± 32%). Plasma concentrations of amoxycillin were comparable in all three treatment groups. Post-treatment H. pylori status was not dependent on those levels, or the drug-induced extent or duration of increased intragastric pH. However, H. pylori-eradicated patients were significantly (P 〈 0.05) older (56 ± 13 years) than patients still H. pylori-positive (47 ± 14 years). In addition, in patients older than 50 years (n = 33), eradication was higher (P 〈 0.01) than in patients (n = 25) below 50 years (65 vs. 24%). Eradication rate was highest (75–83%) in subgroups of patients (〉50 years and history of peptic ulcer or smokers). Neither activity/grade of peptic ulcer or erosive gastritis nor initial diagnosis were predictors for clinical outcome. Conclusion: The age of patients must be regarded as a major determinant of H. pylori eradication rate and may represent an important factor contributing to the highly variable clinical results.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have investigated the absorption and urinary excretion of tripotassium dicitrato bismuthate during a treatment course of 4 weeks in 7 patients with normal renal function (creatinine clearance 115 ± 29 ml/min; mean ± S. D.), in 7 patients with impaired renal function (creatinine clearance = 34 ± 19 ml/min) and in 4 dialysed patients. Following the first dose of tripotassium dicitrato bismuthate (216 mg bismuth b.d.), and after 2 and 4 weeks of treatment (dialysed patients received only 108 mg/b.d.), plasma and urine concentrations of bismuth were monitored for 2 and 24 h, respectively. After stopping therapy plasma and urine concentrations of bismuth were followed for 4 and 6 weeks, respectively. In all three groups of patients small amounts of bismuth (mean values 0.26 to 0.28% of dose) were rapidly (transient mean peak concentrations between 40 and 134 μg/L) reached within about 30 to 40 min, absorbed and alasma levels demonstrated a wide intra- and inter-individual variability. Absorption profiles were not altered during the treatment course; however, the trough plasma concentration of bismuth demonstrated an about 3- to 5-fold accumulation (correlated to creatinine clearance) from about 5 μg/L to 15 μ/L (normal renal function) or to 20–25 μ/L (impaired renal function). Pre-study bismuth levels could be detected within 2 to 4 weeks after stopping therapy in all subjects whereas urinary concentrations were still elevated 6 weeks after the course of treatment.Our results indicate that tripotassium dicitrato bismuthate is absorbed in very low amounts during standard therapy. However, dependent on renal function, accumulation to non-toxic levels does occur during a course of treatment. It appears prudent to halve tripotassium dicitrato bismuthate dosage in patients with severe renal insufficiency (creatinine clearance ± 20 ml/min) to avoid any possible toxic risks. In such patients monitoring of the plasma bismuth concentration might be helpful, especially if longer or repeated treatment is anticipated.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Cambridge, MA, USA : Blackwell Science Ltd
    Helicobacter 3 (1998), S. 0 
    ISSN: 1523-5378
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Triple therapy regimens including two antibiotics plus acid suppression have become the new standard therapy in Helicobacter pylori eradication because of success rates of about 90%. However, these regimens are still costly, duration is about one week or less, and side-effects are not negligible. We therefore evaluated a new quadruple therapy, because theoretically a shorter duration of treatment may result in reduced costs, fewer side-effects, and possibly in a lower potential for antibiotic resistances.〈section xml:id="abs1-2"〉〈title type="main"〉Methods.Controlled, prospective pilot study including H. pylori-positive patients with gastric or duodenal ulcers or erosive gastritis, treated after failure of dual therapy (proton-pump-inhibitors or ranitidine plus amoxicillin) or for the first time. They were assigned to a one week triple standard therapy, consisting of metronidazole 400~mg bid~ + omeprazole 20~mg bid ~+ clarithromycin 250~mg bid, or a newly created quadruple-regimen, which adds amoxicillin (1~g bid) to the above triple regimen. Each of the four drugs was given for 5~days. H. pylori status was checked by 13C urea breath test before and after four weeks of therapy.〈section xml:id="abs1-3"〉〈title type="main"〉Results.A total of 71 patients were treated by quadruple therapy, and 42 patients were treated by triple therapy. The eradication rate of H. pylori for patients under quadruple treatment, without vs. with previous dual therapy, were 96% vs. 92% (42/44 vs. 22/24) by per protocol and 91% vs. 88% (42/46 vs. 22/25) by intention to treat analysis (comparisons not significant). No major side-effects were reported.〈section xml:id="abs1-4"〉〈title type="main"〉Conclusions.~Five-day quadruple therapy (with omeprazole, metronidazole, clarithromycin and amoxicillin) represents an effective and safe new regimen for H. pylori eradication.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1523-5378
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background. One week of quadruple therapy including metronidazole is recommended for Helicobacter pylori treatment failures after first line therapy regardless of resistance status. This study investigated whether a quadruple regimen containing furazolidone could be effective as a third-line (salvage) therapy.Methods. All patients with previous H. pylori treatment failure after a clarithromycin-metronidazole ± amoxicillin combination plus acid suppression were given lansoprazole 30 mg twice a day (bid), tripotassiumdicitratobismuthate 240 mg bid, tetracycline 1 g bid, metronidazole 400 mg (PPI-B-T-M) three times a day (tid) for 1 week. In the case of treatment failure with this second-line therapy, the same regimen was applied for 1 week except for using furazolidone 200 mg bid (PPI-B-T-F) instead of metronidazole (sequential study design).Results. Eighteen consecutive patients were treated with PPI-B-T-M. Eleven of those 18 remained H. pylori positive (38.9% cured). Pretherapeutic metronidazole resistance was associated with a lower probability of eradication success (10% vs. 75%, p= .04). Ten of these 11 patients agreed to be retreated by PPI-B-T-F. Final cure of H. pylori with PPI-B-T-F was achieved in 9/10 patients (90%) nonresponsive to PPI-B-T-M.Conclusions. In the presence of metronidazole resistance, PPI-B-T-M as a recommended second-line therapy by the Maastricht consensus conference achieved unacceptable low cure rates in our metronidazole pretreated population. In this population, metronidazole based second-line quadruple therapy may be best suited in case of a metronidazole-free first line-regimen (e.g. PPI-clarithromycin-amoxicillin) or a low prevalence of metronidazole resistance. Furazolidone in the PPI-B-T-F combination does not have a cross-resistance potential to metronidazole and is a promising salvage option after a failed PPI-B-T-M regimen.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Dyspepsia can be associated with H. pylori infection.Aim : To assess dyspeptic symptoms and potentially influencing factors before and up to 6 months following successful H. pylori eradication therapy.Methods : Prospective cohort study involving H. pylori positive subjects from ambulatory or hospitalized care. Main outcome measures were symptoms during baseline and follow-up, the proportion of symptom-free patients, and symptom scores.Results : After successful eradication, the summary score of all dyspeptic symptoms decreased and during follow-up, the proportion of symptom-free patients was higher in the group with peptic ulcers (69.4% vs. 40.9%, P 〈 0.0001) than with functional dyspepsia (FD).Regardless of diagnosis, virulent strains of H. pylori were associated with a higher prevalence of epigastric pain before treatment: absolute risk-difference (ARD) with Oip-A: 18.2%, Odds Ratio (OR) 2.35 [1.3–4.2, 95%-CI], P = 0.01; with Cag-A: 24.6%, OR 2.81 [1.6–5], P = 0.01. Low-dose aspirin in part was a major risk factor in FD for previous weight loss bdfore study entry. Post-treatment, non-ulcer patients were more likely to suffer from distention/bloating. Likewise, alcohol induced persistence of nausea and vomiting in this population.Conclusions : Dyspeptic symptoms in H. pylori infected patients are more common with virulent strains. Symptoms are more likely to persist despite successful eradication if patients initially harboured virulent strains or concomitant aspirin or alcohol intake are present. In one-third of peptic ulcer patients, symptoms will not be cured 3 months after therapy.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 68 (1990), S. 959-963 
    ISSN: 1432-1440
    Keywords: Drug resistance ; Gastric emptying ; H2-receptor antagonists ; Motility ; Ranitidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary H2-receptor antagonists are known to fail to increase the intragastric pH in some patients (so-called non-responders), and we have recently found a higher frequency of non-responders among cirrhotics. Since intragastric pH is also affected by gastric emptying, in the present study we determined the gastric emptying of 300 ml orange juice labelled with [99mTc]-Solco Nanocoll using a gamma camera. Measurements were made over a period of 60 min in cirrhotic patients and controls without liver disease who either responded to 300 mg ranitidine or showed no response. The mean (±SD) liquid half-emptying time (T1/2) was 26.3±17.5 min (range, 9–75 min) in responders (n=10), 20.9±8.6 min (range, 7–34 min) in non-responders (n=10), 19.4±19.2 min (range, 7–75 min) in cirrhotics (n=11), and 27±4.6 min (range, 17–33 min) in controls (n=9). In 19 of the 20 subjects gastric emptying was normal (T 1/2, 〈40 min). Since gastric emptying was not delayed in any of the non-responders, it would appear very unlikely that gastric motility plays a major role in the non-response to H2-receptor antagonists.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 253 (1975), S. 268-268 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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