Omeprazole Magnesium. Treats Frequent Heatburn Occurring 2 or More Days a Week. Delayed-Release Capsules 20.6 mg. Walgreens Pharmacist Recommended*. Tips for Managing Heartburn: Do Not Lie Flat or Bend Over After Eating. Do Not Wear Tight-Fitting Clothing Around the Stomach. Do Not Eat Before Bedtime. Raise the Head of Your Bed. Avoid Heartburn Causing Foods Such as Rich, Spicy, F.