As a heart patient, choosing the right acidity medication is important to avoid drug interactions. Generally, H2 blockers like famotidine are safe. If you require a proton pump inhibitor, pantoprazole is often preferred because it is less likely to interact with blood thinners like clopidogrel. Avoid antacids with high sodium content, as they can affect blood pressure and fluid balance. Because your symptoms have lasted for weeks, please consult your cardiologist before starting any new over-the-counter or prescription treatment. They will safely recommend the best option tailored to your specific heart medications.