Do Everyday Foods Secretly Interfere With Your Medications?
Can common foods, drinks, and products interfere with your medications without you realizing it?
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In this Ask the Pharmacist segment, Dr. Shannon Yarosz, Assistant Professor of Pharmacy Practice at Cedarville University, explains how common foods, drinks, and over-the-counter products can interact with medications in ways many people don’t expect. From dairy and leafy greens to coffee and grapefruit juice, these everyday items may affect how your medications are absorbed or metabolized.
Timestamps:
0:00 Introduction to food and medication interactions
0:30 Dairy and antibiotics — what to know
0:56 Leafy greens and blood thinners (warfarin)
1:18 Tyramine-rich foods and MAOIs
1:39 Drinks that interfere with medications
1:44 Grapefruit juice and metabolism effects
2:10 Coffee, caffeine, and medication absorption
2:27 Energy drinks and herbal ingredients
2:50 Over-the-counter medications and risks
3:15 How to check for interactions safely
3:54 Submit your questions to Ask the Pharmacist
You’ll learn why calcium in dairy can reduce antibiotic effectiveness, how vitamin K in green vegetables impacts blood thinners, and why consistency in your diet matters. Dr. Yarosz also highlights the risks of tyramine-rich foods with certain medications and explains how drinks like grapefruit juice and caffeine can change drug levels in your body.
The conversation also covers common over-the-counter medications like ibuprofen and decongestants, which may increase bleeding risk or raise blood pressure when combined with prescriptions. Her key advice is simple: Always read medication labels and consult your pharmacist to avoid harmful interactions.
Ask the Pharmacist is presented by the Cedarville University School of Pharmacy in partnership with @WDTNTV
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In this episode of Ask the Pharmacist, Dr. Shannon Yarosz from Cedarville University explains how everyday foods, drinks, and over-the-counter medications can interfere with prescriptions. Learn about key interactions involving dairy, leafy greens, grapefruit juice, caffeine, and common OTC products, along with practical tips for staying safe and informed.