Some foods can increase your body’s absorption of certain medications, making the effect more potent. Other foods slow absorption, making the medication less powerful and less effective. Reactions can range from skin rashes, nausea, headaches and dizziness, to organ failure and even death, although that is rare.
Food interactions to watch out for include:
- Grapefruit: Can block enzymes that process calcium channel blockers that are used to treat heart and blood pressure problems. Grapefruit can also affect some statins, used to lower cholesterol, and some cancer treatment drugs.
- Liver, broccoli and spinach: High in vitamin K that can interfere with the blood thinner warfarin.
Take special care with alcohol, which should also be completely avoided while taking warfarin and many other medicines.