Food and prescription drug interactions to watch out for

There are several prescription drugs that cause a negative drug interaction with certain foods. Here is a list of some of the most common. And if you are taking thyroid medication, be sure to wait 45 to 60 minutes before your morning cup of coffee so your medication can be absorbed. Coffee has a negative effect on thyroid medications.

By CNN on WTHR.com

You’ve probably seen the sticker on medicine bottlesthat reminds you to “take with food” or “take on an empty stomach.” Now pharmacists have a warning that goes even further. Some food and drugs don’t mix.

A grapefruit or a banana sounds like a healthy way to start your day, but not if you are on certain blood pressure or cholesterol medication

Nancy MacDonald is a pharmacist who cautions, “If a patient is taking a banana a day and they’re also taking a medication that can increase their potassium then both together might make their potassium too high and that can actually cause some cardiac problems”

ACE inhibitors like Lisinipril are a good example

Grapefruit interacts with many different medications, both increasing and decreasing the effectiveness. If you are on statins for cholesterol, and certain antihistamines, pay attention to your grapefruit consumption.

Dairy products, along with other foods rich in calcium, are another potential problem group.

“Those can interfere with medicines a good example of that would be the tetracycline, doxycycline, ciprofloxacin, those are antibiotics,” said MacDonald.

Anyone on thyroid replacement needs to pay attention to what they eat.

“The correct way to take a thyroid medication is to take it on an empty stomach,” said MacDonald.

Foods with soy, including soy sauce, tofu, soy milk can affect absorption, but many also believe something about the soy also worsens thyroid conditions.

Pickled, cured, and fermented foods contain tyramine.

“The medicines you need to be concerned about with tyramine are the monoamineoxidase inhibitors, some Parkinson medications,” said MacDonald.

That combination can produce a dangerous increase in blood pressure.

The blood thinner Warfarin or Coumadin is sensitive to vitamin K-rich foods, including a long list of healthy things, like kale and other leafy greens. If you are on Coumadin, it is essential to talk to someone about your diet.

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