Why Should Certain Medications Be Taken With or Without Food? Here's Why It Matters

Some prescription medicines come with instructions to take them after meals, while others should be taken on an empty stomach. But does it really make a difference? Yes, it does. According to VidaCure Pharmacy, food can either improve or interfere with the way certain medications are absorbed by the body. 

Which Medicines Are Best Taken on an Empty Stomach?

Some medications are best taken on an empty stomach to boost optimal absorption into the bloodstream. Another reason is to prevent food interactions that can cause potential side effects and decrease effectiveness. 

Here are some examples of medications that are recommended to be taken on an empty stomach: 

  • Antibiotics – Certain antibiotics, such as ampicillin, fluoroquinolones, and tetracyclines, are best taken on an empty stomach to get the most benefit from your treatment. 
  • Bisphosphonates – They help prevent bone breakdown and are used to treat osteoporosis. Bisphosphonates are taken with a glass of plain water before eating or taking other medicines in the morning. Do not eat or drink for 30 to 60 minutes after taking this medication.  
  • Sucralfate – This oral drug is prescribed to treat intestinal ulcers by creating a protective layer over the ulcer. It should be taken on an empty stomach, one hour before your meal or two hours after eating. Avoid spicy and high-fat foods that may worsen ulcers. 
  • Thyroid Medications – Levothyroxine is a thyroid medication used to treat hypothyroidism. It is usually taken in the morning, at least 30 to 60 minutes before eating breakfast. When taking this medicine, it is recommended to avoid grapefruit juice, soybean, dietary fiber, walnut, coffee, and milk. 
  • Oral semaglutide – Recommended for Type 2 diabetes and weight loss, this medication is best taken before eating in the morning. For better absorption, wait at least 30 minutes before eating breakfast or drinking after taking oral semaglutide.  
  • Captopril – It is used to treat hypertension, diabetic nephropathy, post-myocardial infarction, and heart failure. Take this medicine on an empty stomach at least 1 hour before eating.
  • Iron Supplements – They are best absorbed on an empty stomach. Avoid having milk, caffeine, and high-fiber foods, such as bran, raw vegetables, and whole grains, at the same time as you take iron supplements. Wait at least two hours after having any of these foods or drinks before taking iron supplements. 
  • Proton Pump Inhibitors (PPIs) – This GERD medicine should be taken 30 minutes before a meal because food can reduce their absorption.

Which Medicines Are Best Taken After Eating?

According to Mount Elizabeth, some medications are recommended to be taken after food to protect the stomach lining and reduce gastrointestinal side effects, such as upset stomach, nausea, or vomiting. Food also allows better absorption and distribution of the medication in the body. Skipping meals with the following medicines can also increase the risk of ulcers, gastrointestinal bleeding, and inflammation of the stomach lining. 

  • NSAIDs – Taking aspirin, ibuprofen, and naproxen on an empty stomach can inflame the stomach lining and cause gastritis, peptic ulcer disease, and colitis. 
  • Corticosteroids – Steroid medications such as prednisone and dexamethasone are taken with food to prevent gastrointestinal side effects.  
  • Some Antibiotics – Cefpodoxime, Rifabutin, and Nitrofurantoin are taken with food to lessen stomach upset and increase absorption.
  • Diabetic Medicines – Metformin should be taken with food to prevent stomach and bowel side effects. 
  • Antacids – Antacids for acid reflux and heartburn (indigestion) are best taken about an hour after eating.

What are some foods to avoid before taking medicine?

  • Grapefruit and grapefruit juice
  • High-fiber foods
  • Dairy products
  • Alcohol
  • Caffeine

What are some foods that are generally safe to eat before taking medicine?

  • Plain crackers or toast
  • Fruits such as apples, bananas, and pears
  • Vegetables, lean protein, and whole grains
  • Foods recommended by your doctor or your healthcare provider 

Bottomline

Some medications are absorbed by the body better when taken on an empty stomach, while others are best taken with food to avoid nausea, vomiting, or upset stomach. Always follow the instructions on the medicine label or the advice of your doctor or pharmacist to improve the medications’ effectiveness and reduce the risk of side effects. 

 

For safe, affordable, and FDA-approved medicines in the Philippines, visit VidaCure. Our experienced pharmacists can advise you on the proper way and best time to take your medications.

FREQUENTLY ASKED QUESTIONS

1. Should all medicines be taken with food?

No. Some medications work best when taken on an empty stomach, while others should be taken with food. 

2. What does "take on an empty stomach" mean?

The timing may vary depending on the medication. In general, taking medicine on an empty stomach means taking it at least one hour before a meal or two hours after eating. To make sure you’re taking your medicine correctly, always follow your doctor’s instructions or consult your pharmacist.

3. Why do some medications need to be taken with food?

Food can help protect the stomach from irritation and reduce nausea, vomiting, or stomach pain.

4. What happens if I take medicine without food when it should be taken with a meal?

Depending on the medication, it may cause stomach upset or other gastrointestinal side effects

5. Who can I ask if I'm unsure how to take my medications?

Your doctor or pharmacist can explain when and how to take your medications safely.

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