Take antacids either 1 hour after or between meals. Avoid dairy foods because the protein in them can increase acid in your stomach. But don't eat yogurt if you are taking antibiotics that contain tetracycline, because calcium-rich foods can interfere with absorption. Also, avoid onions, garlic, and vitamin E because they can increase the drug's effect and lead to bleeding. The combination could give you headaches, high blood pressure, chest pain, sweating, rapid heartbeats, rapid pulse, and vision changes.
Extreme cases can result in stroke, heart attack, coma, and death.
The drug theophylline can be weakened if you regularly eat foods that have been charbroiled. Therefore, avoid salty foods and natural black licorice because they increase these losses. Ask your doctor if you need supplements. Also avoid large doses of vitamin D because it can elevate blood pressure. Avoid dairy foods when taking laxatives because calcium can decrease absorption.