Medication Summary
Therapeutic response for the treatment of gastroesophageal reflux disease may take as long as 2 weeks. If treatment is successful, weight increases and vomiting episodes decrease.
Prokinetic agents
Class Summary
These agents are used to augment cholinergic activity. Prokinetic pharmacotherapy is often used before acid suppression therapy in children without evidence of esophagitis because of the predominance of motility-related problems over increased acid (and regurgitation over pain) in the pathogenesis and presentation.
Metoclopramide (Reglan)
Dopaminergic antagonist that works by increasing LES tone and gastric emptying. Stimulates muscular activity, leading to decrease in reflux.
Antacids
Class Summary
These agents are used as diagnostic tool in providing symptomatic relief in infants. Associated benefits include symptomatic alleviation of constipation (aluminium antacids) or loose stools (magnesium antacids).
Aluminum hydroxide (ALternaGEL, Amphojel)
Increases gastric pH above 4 and inhibits proteolytic activity of pepsin, reducing acid indigestion. Antacids can initially be used in mild cases. No effect on frequency of reflux but decreases its acidity.
Magnesium hydroxide (Phillips Milk of Magnesia)
Causes osmotic retention of fluid, which distends colon and increases peristaltic activity. Forms magnesium chloride in vivo after reacting with stomach hydrochloric acid.
H2 receptor antagonists
Class Summary
Like antacids, these agents do not reduce the frequency of reflux, but they decrease the amount of acid in the refluxate by inhibiting acid production. All are equipotent when used in equivalent doses. Work best in patients with nonerosive esophagitis. Because of proton pump inhibitor (PPI) superiority, H2 blockers are reserved for use in patients unable to tolerate PPIs.
Ranitidine (Zantac)
Inhibits histamine stimulation of the H2 receptor in gastric parietal cells, which reduces gastric acid secretion, gastric volume, and hydrogen ion concentrations.
Famotidine (Pepcid)
Competitively inhibits histamine at H2 receptor of gastric parietal cells, resulting in reduced gastric acid secretion, gastric volume, and hydrogen ion concentrations.
Proton pump inhibitors
Class Summary
These agents are indicated in patients who need complete acid suppression (eg, infants with chronic respiratory disease or neurologic disabilities). Administer with the first meal of the day (children with nasogastric or gastrostomy tubes may have granules mixed with an acidic juice, then flush tubes to prevent blockage).
Omeprazole (Prilosec)
Decreases gastric acid secretion by inhibiting the parietal cell H+/K+ -ATP pump. Used for the short-term treatment (4-8 wk) of GERD.
Lansoprazole (Previcid)
Suppresses gastric acid secretion by specific inhibition of the (H+, K+)-ATPase enzyme system (ie, proton pump) at the secretory surface of the gastric parietal cell. It blocks the final step of acid production. The effect is dose-related and inhibits both basal and stimulated gastric acid secretion, thus increasing gastric pH.
Esomeprazole magnesium (Nexium)
S-isomer of omeprazole. Inhibits gastric acid secretion by inhibiting H+/K+ -ATPase enzyme system at secretory surface of gastric parietal cells.
Used in severe cases of and patients not responding to H2 antagonist therapy.
Used for up to 4 wk to treat and relieve symptoms of active duodenal ulcers; may be used up to 8 wk to treat all grades of erosive esophagitis.
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