Herbal tea is often seen as a soothing and natural choice, but certain blends can interfere with common medications. Health experts warn that some combinations may reduce drug effectiveness or even lead to harmful side effects.
Antidepressants
Teas containing St. John’s wort can be dangerous for those taking antidepressants. The herb may amplify serotonin activity, which in some cases can trigger a potentially serious condition known as serotonin syndrome.
Omeprazole
Used for heartburn and reflux, omeprazole may be less effective if combined with herbal teas like ginkgo biloba. This herb can interfere with the way the drug is metabolized, leaving symptoms unresolved.
Blood thinners and ibuprofen
Chamomile, ginseng and ginkgo biloba teas may increase the risk of bleeding when taken alongside blood-thinning medications or even ibuprofen. In rare cases, the combination has been linked to severe complications.
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Metformin
People with type 2 diabetes using metformin should be cautious with teas such as goldenseal, which may lower drug levels in the blood. On the other hand, ginseng tea could intensify the glucose-lowering effect and cause hypoglycemia.
Statins
Cholesterol-lowering statins can interact poorly with grapefruit tea. The fruit compounds may raise drug levels in the blood, increasing the risk of muscle damage and liver issues.
Cyclosporine
This medication, often prescribed after organ transplants or for autoimmune conditions, has multiple interactions. Herbal teas containing chamomile, grapefruit or St. John’s wort can either raise cyclosporine levels to unsafe heights or reduce its protective effect.
Benzodiazepines
Valerian root tea is sometimes used for relaxation, but pairing it with medications like Xanax, Valium or Klonopin can cause excessive drowsiness and dangerous sedation.
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Why herbal teas cause problems
Many herbal ingredients are processed by the same liver pathways as prescription drugs. This overlap can either increase the potency of a drug or block its effectiveness, depending on the combination.
Not all interactions are equal
Some interactions are considered moderate and can be managed with close monitoring, while others are severe enough to warrant complete avoidance. Checking with a healthcare provider before use is always advised.
Safer tea choices
If cleared by a doctor, teas from trusted sources are generally safer. Avoid buying unregulated or discounted products online, as the actual ingredients may differ from what is listed.
Artiklen er baseret på informationer fra EatingWell
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