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Biomedical subjects

C Y Nio

Publications and source records attributed to C Y Nio.

3 recordsLinked to original sources

Reflux esophagitis.

The various therapeutic approaches for reflux esophagitis are to increase the competence of the antireflux barrier, to enhance esophageal clearance, to improve gastric emptying and pyloric sphincter competence, to coat damaged tissue, and, especially, to reduce the volume and pH of gastric contents. Of the prokinetic agents, cisapride is the only drug with proven benefit. Single-agent therapy with conventional-dose H2-receptor antagonists or sucralfate results in similar degrees of symptom relief and healing. Post-evening meal (PEM) dosing of H2-receptor antagonists appears to be a rational method of suppressing late evening gastric acidity, but on balance the symptomatic response of twice daily dosing is superior to once daily dosing. More rapid symptom relief and healing are achieved with high-dose H2-receptor antagonists and omeprazole. The significance of sustained a(hypo)chlorhydria remains to be established. To prolong the symptomatic and/or endoscopic remission, the therapy has to be continued long-term with high-dose H2-receptor antagonist, cisapride either alone or in combination with H2-receptor antagonist, or sucralfate with or without H2-receptor antagonist. In the elderly or complicated patient long-term omeprazole may be a justified alternative.

Anti-Ulcer Agents

The medical therapy of reflux oesophagitis.

Besides changes in behaviour and lifestyle we nowadays have the choice of specific drugs in the treatment of reflux oesophagitis. A distinction can be made in motility modulating drugs, which stimulate oesophageal peristalsis and LOS pressure, mucosa-protecting drugs, which form a protective layer on the oesophageal mucosa, acid neutralizing (antacids) and acid suppressing drugs (H2-receptor antagonists, omeprazole). So far the results of medical therapy of reflux oesophagitis are still suboptimal. Giving the H2-receptor antagonists with the evening meal would possibly be more appropriate. A valid alternative is the mucosa-protecting agent sucralfate. Monotherapy will probably be insufficient for full healing, which explains why trials of combination therapy (H2-receptor antagonists plus sucralfate or plus cisapride) are being conducted. If omeprazole becomes available, it will revolutionize the therapy of severe reflux oesophagitis. Many questions (dose, duration, maintenance, safety monitoring etc.) remain to be determined.

Antacids

Mucosa protectives: sucralfate and colloidal bismuth subcitrate in peptic ulcer disease.

Mucosa protective drugs are thought to have an important role in the treatment of both duodenal (DU) and gastric ulcer (GU) disease by means of correcting the disturbed defensive factors. Sucralfate as well as colloidal bismuth subcitrate (CBS) form a layer on the ulcer base and in this way protect the ulcer from acid, peptic activity and bile. In duodenal ulcer sucralfate and CBS have shown a significant difference in healing rate compared with placebo. The same holds true for gastric ulcer. When compared with H2-receptor antagonists the healing rates obtained with sucralfate are rather similar. The data obtained with CBS tend to be superior. Also the scores for symptomatic improvement are indistinguishable compared to that seen with H2-receptor antagonists. Especially after CBS the relapse rates of both DU and GU appear less and delayed. Mucosa protective agents are to be considered as valid alternatives to the H2-receptor antagonists.

Cimetidine