Determination of tenatoprazole enantiomers and their enantioselective pharmacokinetics in rats

Chiral separation in the class of proton pump inhibitors by chromatographic and electromigration techniques: An overview

Proton pump inhibitors (PPIs) are benzimidazole-derivative chiral sulfoxides, frequently used in the treatment of gastric hyperacidity-related disorders. Due to their stereoselective metabolism, the eutomeric forms of PPIs can present a more advantageous pharmacokinetic profile by comparison with the distomers or racemates. Moreover, two representatives of the class are used in therapy both as racemates and as pure enantiomers (esomeprazole, dexlansoprazole). A relatively large number of enantioseparation methods employed for the stereoselective determination of PPIs from pharmaceutical, biological, and environmental matrices were published in the past three decades. The purpose of the current overview is to provide a systematic survey of the available chiral separation methods published since the introduction of PPIs in the therapy up to the present. Analytical and bioanalytical methods using different chromatographic and electromigration techniques reported for the enantioseparation of omeprazole, lansoprazole, pantoprazole, rabeprazole, ilaprazole, and tenatoprazole are included. The analytical conditions of the presented methods are summarized in three comprehensive tables, while a critical discussion of the applied techniques, possible mechanism of enantiorecognition, and future perspectives on the topic are also presented.

Nursing care in neonates with gastrointestinal bleeding administered omeprazole via a gastric tube

AIM: To investigate nursing care in neonates with gastrointestinal bleeding administered omeprazole via a gastric tube.

METHODS: Eighty neonates with gastrointestinal bleeding treated from June 2011 to June 2012 were randomly and equally divided into a study group and a control group. The control group received gastric tube insertion, rinsing with saline, and was given vitamin K after improvement, while the study group received gastric tube insertion, rinsing with sodium bicarbonate, and was given omeprazole after improvement. Clinical effects were compared between the two groups.

RESULTS: The effective rate was significantly higher in the study group than in the control group (92.5% vs 62.5%, P < 0.05). The times to vomiting relief, melena disappearance, and occult blood test negativity were significantly lower in the study group than in the control group (P < 0.05). No adverse reactions occurred in either group.

CONCLUSION: Omeprazole administration via a gastric tube is feasible in the treatment of neonatal gastrointestinal bleeding, and targeted care can improve efficacy and promote better recovery.