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This review project, including the publication of this article, was funded by Takeda Pharmaceutical Company Limited.
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Rats treated with lansoprazole showed significantly reduced body weights compared to controls (lansoprazole-treated rats and controls, 322.3±15.3 g vs 403.2±5.2 g, respectively, p<0.001). However, stool frequencies and consistencies did not differ between the two groups. The composition of the gut microbiota in lansoprazole-treated rats was quite different from that of the controls. In the controls, the microbiota profiles obtained from the terminal ileum showed a predominance of Proteobacteria (93.9%) due to the abundance of Escherichia and Pasteurella genera. Conversely, lansoprazole-treated rats showed an elevated population of Firmicutes (66.9%), which was attributed to an increased ratio of Clostridium g4 to Lactobacillus genera.
Of 284 patients enrolled in the study from 46 US sites, 236 met the entry criteria. At 4 to 6 weeks after the end of therapy, H pylori was eradicated in 85% (96/ 113) of the patients receiving 14-day triple therapy and in 84% (103/123) of those receiving 10-day triple therapy by per-protocol analysis (95% confidence interval for treatment group differences, -10.5 to 8.1; P>.05). There was also no significant difference between the 14- and 10-day treatment groups when analyzed by an intent-to-treat analysis of H pylori eradication. A similar proportion of patients in each treatment group reported an adverse event related to therapy (34% [46/136] vs 38% [56/148], respectively).
The mean +/- s.d. values were 60% +/- 22% for the percentage of time pH < 4, 172 +/- 178 for the acidity index and 1114 +/- 1176 mmol/L.h for the integrated intragastric acidity. Both the integrated intragastric acidity (r = 0.63) and acidity index (r = 0.70) showed only fair correlation with the percentage of time pH < 4. In contrast, there was a strong positive correlation (r = 0.93) between the acidity index and integrated intragastric acidity.
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The mean symptom scores during the placebo period in the groups given lansoprazole first and placebo first were as follows: reflux score, 21.5 and 17.6, respectively (not significant); total score, 11.2 and 10.3, respectively (not significant); and antacid score, 8.2 and 7.2, respectively (not significant).
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We report a case of a 75-year-old woman with urgent watery diarrhea, occurring 5 to 8 times per day, which began after starting lansoprazole (30 mg/day) for erosive gastritis. Her chronic watery diarrhea persisted for over 2 years with mild weight loss. Colonoscopy was performed and biopsies showed collagenous colitis in her transverse colon. We therefore replaced lansoprazole with famotidine (20 mg/day). Within 3 days after the discontinuation of lansoprazole, her watery diarrhea resolved and she recovered, and reported normal feces. Increasing age and female gender are major risk factors for collagenous colitis. The differential diagnosis of collagenous colitis should include: 1) an appropriate clinical history, excluding other etiologies, 2) normal or near-normal endoscopic and/or radiographic findings, and 3) colonoscopic biopsy histopathologic findings consistent with collagenous colitis. The histopathologic findings of colonoscopic biopsy are important for diagnosis. However, because of the colonoscopic burden in elderly patients, we first recommend the discontinuation of medications suspected to cause collagenous colitis.
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this study was a multicenter observational postmarketing study of lansoprazole (Prosogan®) injection. Patients with upper gastrointestinal bleeding due to peptic ulcers or erosive gastritis were given intravenous lansoprazole for a maximum of 7 days or until the bleeding stopped and the patients were able to take oral doses of lansoprazole. Primary outcome of the study was cessation of bleeding. Some laboratory parameters were also measured.
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Dyspepsia Research Clinic.
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Rabeprazole was an effective and well-tolerated treatment for Zollinger-Ellison syndrome or idiopathic gastric acid hypersecretion, which reliably reduced gastric acid output to safe levels. Although a dose of 60 mg once daily was appropriate for most patients in this study, doses may need adjustment according to individual response.
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The symptoms of dyspepsia, which may include epigastric pain, heartburn. bloating, and early satiety, defy diagnosis in as many as 50% of patients, even after endoscopy and other appropriate studies. In the other half of patients, such causative disorders as gastroesophageal reflux disease (GERD), peptic ulcer disease, cholecystitis, pancreatitis, and gastric cancer may be diagnosed. Despite controversy regarding the selection of therapy, empiric treatment is common for apparent idiopathic dyspepsia. Histamine2-receptor antagonists, proton pump inhibitors (PPIs), promotility agents, and coating agents have all been used as empiric therapy for dyspeptic symptoms. With empiric treatment, subsequent management is directed by the therapeutic response. In the absence of a definitive diagnosis, treatment is usually selected on the basis of the type and severity of symptoms, a thorough history and physical examination, and factors such as age and the presence of Helicobacter pylori infection. Five PPIs are currently available--lansoprazole, omeprazole, rabeprazole, pantoprazole, and esomeprazole--all with established efficacy in GERD and other acid-mediated disorders. The PPIs can be expected to be useful in certain patients with dyspepsia, and may be prescribed for patients who are found to re- spond to potent antisecretory therapy. Patients' concern about their symptoms, practical considerations, and restrictions imposed by managed care organizations may all affect the choice between empiric therapy and early endoscopy in patients with dyspepsia.
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Of 58,605 unique patients seen in this VA health care system in the 12-month period from July 1, 2008, through June 30, 2009, 13,713 (23.4%) received a PPI, and of these, 10,483 (76.4%) received at least 120 PPI units and were defined as long-term users. Of the long-term users, 9,462 (90.3%) were on the formulary PPI generic omeprazole, and 1,021 were nonformulary PPI users. Use of nonformulary PPIs (esomeprazole, pantoprazole, lansoprazole, rabeprazole) accounted for 10.5% of the PPI units and 9.7% of the users but 57.3% of total PPI cost. This pattern resulted in $570,263 in excess spending (i.e., $570,263 would have been saved in the study period if the nonformulary PPI users had used the formulary drug). The most common reason for nonformulary long-term PPI use was persistent symptoms (n=901, 88.2%). Adverse reaction was cited by 111 (10.9%) of nonformulary PPI users, 33.3% (n=37) of whom reported diarrhea. Of those who switched to a nonformulary PPI due to persistent symptoms, 363 (40.3%) were on once-daily dosing prior to the switch; 379 (42.1%) were on twice-daily dosing; and 159 (17.6%) were transfers from other places in which prior dosing information was not available in the hospital pharmacy records.
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Ornidazole-based sequential therapy did not show any superiority compared to the standard triple treatment in children with Helicobacter pylori infection.
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To investigate the protective effect of lansoprazole on ischemia and reperfusion (I/R)-induced rat intestinal mucosal injury in vivo.
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The high-dose H2RA strategy is not preferred in terms of either costs or benefits. The PPI strategy appears cost effective relative to the standard-dose H2RA strategy in the following situations: when patients are significantly bothered by esophagitis and in institutional settings where the difference in drug costs between PPIs and H2RAs is small.
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To study the potential pharmacokinetic interaction between lansoprazole or pantoprazole and theophylline at steady state.
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Eight H. pylori-positive patients with gastric ulcer were enrolled, and tissue samples were obtained endoscopically from the antrum and corpus. The tissue contents of neutrophil myeloperoxidase (MPO) and oxygen-derived free radicals were quantified by ELISA and chemiluminescence (ChL) assay. The H. pylori density in the tissue specimens was scored by immunohistochemistry and the mucosal infiltration by neutrophils and monocytes was scored by histopathology. The effects of PPI on these parameters were evaluated by oral administration of lansoprazole (LPZ) at the dose of 30mg od for 8 weeks, followed by 15mg for 24 weeks.
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Triple-drug regimen achieves similar eradication rates as quadruple-drug regimen in H. pylori infection.
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When taking the drug with breakfast, the median percentage time for which gastric pH < 4.0 was 17.2 (interquartile range 4.6-45.5), compared with 42.0 (interquartile range 31.4-48.8) when taken without food (P=0.01). Fifteen subjects had better control of gastric acidity when the medication was taken with breakfast. A pH threshold of 3 and median pH showed similar differences. When the breakfast period was removed, the differences were no longer statistically significant.
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To investigate the pharmacokinetics, optimal dosage and efficacy of lansoprazole in paediatric patients.
Twenty-one healthy volunteers were randomized to receive either omeprazole or lansoprazole. They were given the drug for two separate periods of 7 days in randomized order and at least 7 days apart. During one period the study medication was taken before breakfast; during the other it was taken at the same hour, but with no meal until 12:00 hours. Lunch was standardized. On day 7, intragastric pH-metry was performed, starting at 08:00 hours. Tracings were analysed for the 8-h period from 08:00 hours until 16:00 hours with regard to percentage time for which gastric pH was below 4.0 and 3.0, and median gastric pH. Tracings were also analysed after removing the 1 h breakfast period, to exclude the buffering effect of the meal.
Among H2-receptor antagonist (H2RA)-refractory ulcers, non-responders that did not heal after 5 months therapy had high intraluminal pH in the basal condition and high sensitivity to inhibition of acid secretion by H2RA but possessed gastric mucosa to generate less prostaglandins. Combination therapy of PGE1-analogue with H2RA healed these ulcers by 60%. Proton-pump inhibitor (PPI) exerted a complete inhibition of acid secretion in these patients and the rate of healing was 88%. Helicobacter pylori was present in the mucosa of all 4 ulcer patients refractory to treatment with PPI. The ulcers healed in 3 out of 4 patients after eradication of H. pylori. It is suggested that PG supplement or complete inhibition of acid secretion is effective for ulcers in H2RA-non-responders. PPI-refractory ulcers may relate to H. pylori infection.