Understanding the Risks of Food and Drug Interactions

Generally, when taking medication, people pay attention to the dosage and timing. However, many are unaware of what to eat or avoid while on medication. Certain combinations of food and medicine can be harmful.

Incorrect combinations can reduce the effectiveness of the medication and may lead to side effects. Therefore, it is crucial to read the label carefully and understand the interaction between food and medicine before consumption.

Which food items are risky with certain medications? How much time should be kept between food and medicine?

• What is a food-drug interaction (FDI)?

This is an interaction between food and medicine. When a medication reacts positively or negatively with a food item, it is called an FDI.

It can decrease or increase the effect of the medication and cause side effects. Doctors advise taking some medicines on an empty stomach and others after meals to ensure they work correctly.

There are several reasons for this:

• Some foods prevent the medicine from dissolving or entering the bloodstream, reducing its effectiveness.
• The liver processes medication, but some foods can speed up or slow down this process.
• Medicine and food can react together, causing side effects.
• It can also affect the absorption of vitamins and minerals.

Can any medicine be taken with any food?

No, not all medicines can be taken with all foods. Some foods can affect the efficacy of the medication. Therefore, pay attention to food and medicine combinations.

How to know which food should not be eaten with which medicine?

It depends on the salt and chemical base of the medication.

• Food and medicine can combine to form new chemicals.
• They can render the medicine ineffective or cause serious reactions.
• There is no universal scientific rule for the right combination.
• Accurate information is provided in medical guidelines.
• Correct information is written on the medicine label.
• The label clearly states whether to take the medicine on an empty stomach or with food, and which foods to avoid.

Which foods should not be eaten with antibiotics?

Do not consume the following with antibiotics:

• Milk
• Yogurt
• Cheese
• Calcium supplements

These can react with the medicine and reduce its absorption.

Which foods should not be eaten with thyroid medication?

Avoid soy products (such as soybeans or soy milk), walnuts, and high-fiber foods. These can block the absorption of the medication in the body.

How much time should be kept between medicine and food?

• It depends on the salt and chemical base of the medicine.
• Some medicines are better absorbed on an empty stomach.
• Some medicines must be taken with food.
• Therefore, get information about the gap from the label or your doctor.

What kind of side effects can occur?

It can reduce the effect of the medicine and cause side effects such as:

• Reduced effectiveness of the medicine
• Stomach pain
• Gas and bloating
• Vomiting and nausea
• Dizziness
• Feeling weak
• Irregular heartbeat
• Fluctuations in blood pressure
• Allergic reactions or rashes

When should you consult a doctor?

If you feel uncomfortable after taking medicine, consult a doctor immediately. Do not ignore these symptoms:

• Severe dizziness
• Difficulty breathing
• Chest pain
• Very fast or slow heartbeat
• Persistent vomiting
• Fainting
• Allergic reaction
• Fluctuations in blood pressure

Do vitamin supplements also react with food?

Yes, this applies to vitamin and mineral supplements as well. Many supplements can react positively or negatively with food or other medications, such as:

• Calcium and iron can reduce each other's absorption.
• Iron supplements are better absorbed when taken with citrus fruits.
• Milk reduces iron absorption but increases vitamin D absorption.
• High-fiber foods can reduce the effect of some vitamins.
• Therefore, pay attention to the timing and food gaps when taking supplements.