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RN Nursing · Medications for Upper GI Disorders · Practice question

A nurse is educating a patient who was recently diagnosed with gastroesophageal reflux disease (GERD) and is prescribed omeprazole. Which of the following statements should the nurse include in the teaching?

Answer & explanation

Correct: "Take omeprazole at least 30 minutes before meals to maximize its effectiveness."

Omeprazole is a proton pump inhibitor that irreversibly blocks the hydrogen-potassium ATPase enzyme in the gastric parietal cells, reducing acid secretion. For maximum therapeutic effect, it must be taken 30 to 60 minutes before the first meal of the day because proton pumps are most active when stimulated by food ingestion, and the drug must be absorbed and reach peak plasma concentration before the pumps are engaged. Taking omeprazole before a meal ensures that the highest concentration of drug is available to inhibit the actively secreting pumps. Stopping omeprazole when symptoms improve without consulting the healthcare provider is unsafe and incomplete treatment; premature discontinuation can lead to symptom relapse and potential complications such as esophageal damage. Crushing omeprazole tablets is contraindicated because the tablets or capsules are enteric-coated delayed-release formulations; crushing destroys this coating, degrades the drug in gastric acid before it reaches the small intestine for absorption, and reduces efficacy. Taking omeprazole with antacids does not increase its effectiveness and may alter the gastric pH environment that affects drug absorption timing; there is no clinical evidence supporting this combination as beneficial.

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