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Forty-six percent dosed optimally. Fifty-four percent dosed sub-optimally with 21 of 54 (39%) dosing >60 min before meals, 16 (30%) after meals, 15 (28%) at bedtime and two (4%) as needed. Only 6% of the subjects on once-daily proton pump inhibitor regimens and 33% of subjects taking proton pump inhibitors two- to three times daily dosed in a manner that maximized acid suppression (15-30 min before a meal).
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Dexlansoprazole MR and esomeprazole strontium offer an innovative delivery mechanism compared to conventional PPIs. Further trials are necessary in order to establish superiority.
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To test whether vitamin C and E supplements to triple therapy can improve the Helicobacter pylori eradication rate and gastric inflammation.
A case with esophageal anisakiasis accompanied by reflux esophagitis is described. A 38-year-old man visited our hospital with complaints of heartburn and disturbance of food passage about seven hours after eating raw cuttlefish. The first esophagogastroscopy revealed an anisakis larva invading the squamocolumnar junction. Near the anisakis larva, a whitish exudate was demonstrated in the distal esophagus just proximal to the squamocolumnar junction. An anisakis larva was easily extracted from the esophagus by forceps. Reflux esophagitis with whitish exudative mucosal lesions and an area of linear erythema more than 5mm long were noted endoscopically 8 weeks after treatment with lansoprazole and cisapride. After six months the third endoscopic examination clarified that there was neither exudate nor erythema in the distal esophagus. Judging from the clinical course that he complained of newly experienced heartburn about seven hours after eating raw cuttlefish, and that whitish exudative mucosal lesions and an area of linear erythema did not disappear at three months after extraction of the anisakis larva. It was concluded that an anisakis larva enters the stomach first and then returns to the esophagus by gastroesophageal reflux.
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Both lansoprazole and omeprazole were equally effective in inducing healing of ulcer (96.1 vs 95.5%, p > 0.05) and eradicating H. pylori (76.9 vs 63.9%, p > 0.05), with very low recurrence rates over a 6-month follow-up period.
To compare the effects of long-term lansoprazole and omeprazole treatment (6 months) on serum gastrin levels.
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Effective anti-Helicobacter pylori therapies with few side-effects are needed.
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The pharmacokinetics of lansoprazole in pediatric patients are age dependent, with those aged 10 weeks-1 year. Thus, pediatric patients aged 10 weeks to achieve similar plasma exposure.
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Three benzimidazole compounds, omeprazole (OP), thiabendazole (TBZ), and lansoprazole (LP), were compared with respect to the induction of CYP1A1-mRNA in human hepatoma cells, HepG2. OP was the most potent inducer among the three compounds, but LP was found to be a weak inducer. Induction by TBZ was at an intermediate level. None of these compounds induced CYP1A1-mRNA in a mouse hepatoma cell line, Hepa-1. The transient expression of mouse Cyp1a1-CAT gene into HepG2 cells showed that OP treatment of the transfectants induced CAT activity to the same degree as 2,3,7,8-tetrachlorodibenzo-p-dioxin treatment. Therefore, the cellular factors in human cells were able to work on the mouse regulatory element. The expression of human aryl hydrocarbon (Ah) receptor in the mouse Hepa-1 mutant cell line cl-19, which is defective in Ah receptor, did not increase the induction level of CYP1A1-mRNA by OP treatment. When the cultured medium of HepG2 cells in the presence of OP was added to the mouse Hepa-1 cell culture medium, CYP1A1-mRNA was not induced in Hepa-1 cells. It is thus concluded that metabolites of OP in human cells are not the ligands for the human Ah receptor. Therefore, in human cells, but not mouse cells, there must be an OP-sensitive activation factor for the human Ah receptor.
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In acute duodenal ulceration, treatment with lansoprazole 15 and 30 mg produced 4-wk healing rates and symptom relief superior to those produced by placebo and the 15-mg dose similar to those produced by placebo. The 15-mg dose of lansoprazole was also superior to ranitidine in healing duodenal ulcer after 4 wk of therapy.
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A significant number of residents in this cohort were taking a combination of clopidogrel and a PPI, mainly omeprazole. Residents who were on the combination of clopidogrel and a PPI, with or without aspirin, were on these combinations for a significantly long duration, which could increase their risk of adverse cardiovascular events.
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Gastric juice pH, ammonia concentration in gastric juice, serum gastrin level, and grade of gastritis in accordance with the Sydney System were determined for patients with gastric ulcer (GU) and duodenal ulcer (DU) before and after treatment with lansoprazole and amoxicillin, and results were compared with those of H. pylori-negative controls.
The mean heartburn score in patients treated with esomeprazole more rapidly decreased than those receiving other PPI. Complete resolution of heartburn was also more rapid in patients treated with esomeprazole for 5 d compared with omeprazole (P = 0.0018, P = 0.0098, P = 0.0027, P = 0.0137, P = 0.0069, respectively), lansoprazole (P = 0.0020, P = 0.0046, P = 0.0037, P = 0.0016, P = 0.0076, respectively), and pantoprazole (P = 0.0006, P = 0.0005, P = 0.0009, P = 0.0031, P = 0.0119, respectively). There were no significant differences between the four groups in the rate of endoscopic healing of reflux esophagitis at week 8.
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To study the effect of aqueous propolis extract (AEP) against indomethacin (Indo)-induced gastric ulcers in irradiated and non-irradiated rats.
An LC-MS/MS method was developed and validated to be used as a stability indicating assay for the study of a 3 mg/mL lansoprazole oral suspension. The method utilizes a UPLC (ultra-performance liquid chromatography) column and unique mass spectrometric detection (ion-trap time-of-flight (IT-TOF)) to achieve a sensitive (LOD 2 ng/mL), accurate, and reproducible quantification of lansoprazole. This method reports an intraday and interday coefficient of variation of 2.98 ± 2.17% (n = 5 for each concentration for each day) and 3.07 ± 0.89% (n = 20 for each concentration), respectively. Calibration curves (5-25 μg/mL) were found to be linear with an R(2) value ranging from 0.9972 to 0.9991 on 4 different days. Accuracy of the assay, expressed as % error, ranged from 0.30 to 5.22%. This method is useful for monitoring the stability of lansoprazole in oral suspension.
Gastro-oesophageal reflux disease (GERD) is characterised by symptomatic heartburn and regurgitation. Treatment with proton pump inhibitors (PPI) effectively decreases heartburn symptoms, but their effects on symptomatic regurgitation are less clear.
Eighty-eight patients with chronic renal insufficiency and H. pylori infection were evenly randomized into two groups receiving 1-week lansoprazole, 30 mg, clarithromycin, 500 mg, and either amoxicillin, 750 mg, or metronidazole, 500 mg, twice daily. The adverse events and compliance with triple therapy were reviewed at the week 1 visit. Patients provided stool samples at week 6 to assess the success of H. pylori eradication by H. pylori-specific stool antigen. The serum creatinine levels were monitored at enrollment, at weeks 1, 2 and 6 and on any unscheduled visit after triple therapy.
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We report a case in which rabeprazole cured gastric tube ulcer after esophagectomy for esophageal squamous cell carcinoma (ESCC). A 47-year-old Japanese man was referred to our hospital with refractory ulcer of the reconstructed gastric tube one year after esophagectomy for ESCC. The ulcer proved refractory to healing by the administration of omeprazole or lansoprazole, or eradication of Helicobacter pylori after examinations concerning ischemia, acid over-secretion and H. pylori infection. Finally, metabolizer type was examined for proton pump inhibitors (PPIs), revealing the patient as a hetero-extensive metabolizer for the CYP2C19 genotype. This suggested sensitivity to rabeprazole, but resistance to omeprazole and lansoprazole. The refractory ulcer was subsequently cured after changing the PPI to rabeprazole. Examination of PPI metabolizer type might thus be important, along with an investigation of ischemia, acid secretion and H. pylori infection in the treatment of refractory gastric tube ulcer after esophagectomy.
We analyzed data on 151 patients who had been prescribed a 10-day PPI/AM re-treatment regimen after eradication failure of 1 to 2 weeks' first-line PPI/AC therapy. The PPI/AM regimen was given according to results of susceptibility testing (S+) in 31 patients. The group that had undergone susceptibility testing was further divided into two subgroups according to dosage: standard dose of omeprazole (O)/AM (n = 11) and double dose of lansoprazole (L)/AM (n = 20). The PPI/AM regimen was given without susceptibility testing (S-) to 120 patients. These patients were also divided into two subgroups according to whether they received omeprazole or lansoprazole: OAM (n = 61) and LAM (n = 59). Cure rates and adverse effects in each group were analyzed.
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The subjects consisted of 265 patients with coronary artery disease. Platelet aggregation function testing (light transmittance aggregometry) was conducted while aspirin and clopidogrel 75 mg were taken orally and the minimum concentration of aggregation induction platelet aggregation threshold index was measured. The ADP-PATI, measured with ADP as the inducing substance, was compared and investigated according to the type of concomitantly used antacid.
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Lansoprazole and tacrolimus are substrates of ATP binding cassette (ABC) transporters such as P-glycoprotein (ABCBI/multidrug resistance 1) and cytochrome P450 (CYP). The purpose of this study was to investigate the implication of the ABCB1 C3435Tpolymorphism on the pharmacokinetics of (R)-lansoprazole, the major enantiomer, in CYP2C19 extensive metabolizers (EMs) and on gastroesophageal symptoms in renal transplant recipients receiving tacrolimus.
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Patients were randomly assigned to conventional therapies (control group) or conventional therapies plus PPI (lansoprazole 15 mg/d; PPI group) and observed for 12 months.