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Many people are familiar with grapefruit and how it can impact medication, but what about other common foods? If you’re heading to Valentine’s dinner this week, it might surprise you to learn which common foods could be interacting with your medication.

“It’s important patients are aware of common food and prescription interactions to ensure they get the maximum benefit from their treatments while staying safe,” says Matthew Hart, M.D., a board-certified family medicine physician with INTEGRIS Health Medical Group Cross Timbers. “The foods you eat can significantly impact how well your medications work, potentially reducing their effectiveness or increasing the risk of dangerous side effects.”

Here are the top interactions to keep in mind.

Antibiotics: Dairy, calcium and certain fruit enzymes can interfere with the infection-fighting power of antibiotics.

• Dairy products like milk, cheese and yogurt should be avoided within two hours of taking most antibiotics.
• Calcium in dairy and acids can prevent proper absorption.
• Pineapple and pineapple juice contain an enzyme that may cause side effects like rash, nausea and diarrhea when taken simultaneously with antibiotics.

Antidepressants: Aged cheese, cured meats, fermented vegetables, beer, red wine and soy products must be avoided if taking MAO inhibitor antidepressants.

• These medications block the enzyme that breaks down tyramine, a naturally occurring amino acid found in aged and fermented foods.
• Even small amounts of these foods can create high tyramine levels that can trigger dangerous blood pressure spikes.

Blood pressure medications: Grapefruit compounds, bananas, avocados, tomatoes and salt substitutes containing potassium are a few of the common foods to watch.

• ACE inhibitors and ARBs don’t mix well with high-potassium foods like bananas, avocados and tomatoes, which can cause muscle weakness and heart rhythm problems.
• Calcium channel blockers become more potent when combined with grapefruit, potentially causing dangerous drops in blood pressure and heart rate.

Blood thinners: Alcohol, garlic, ginger and tomatoes can increase bleeding risk when combined with these medications.

• Medications like warfarin and digoxin have complex food interactions that can either increase bleeding risk or reduce the medication’s effectiveness.
• Grapefruit juice reduces drug absorption and can make blood thinners less effective at preventing clots.

Immunosuppressants and steroid medications: Licorice, grapefruit juice, raw or undercooked meats, unpasteurized beverages and soft cheeses pose risks.

• These foods are best avoided as they can interfere with drug metabolism or pose infection risks to those with compromised immune systems.
• Food safety becomes especially important when your immune system is suppressed by medication.

Statins: Grapefruit and grapefruit juice should be completely avoided when taking any statin medication.

• Even small amounts of grapefruit can increase drug levels enough to cause muscle pain, weakness and potentially dangerous muscle breakdown.
• Other citrus fruits like oranges and lemons are generally safe alternatives.

“Always discuss your diet and medication with your doctor or pharmacist,” Hart says. “Read medication labels carefully for warnings about food interactions. In general, it’s also a good step to limit alcohol consumption, as alcohol can worsen side effects or alter the medicine’s effectiveness.”

INTEGRIS Health encourages Oklahomans who have questions about their medications or need guidance on managing complex drug regimens, to schedule an appointment with a primary care doctor today.