Sharing a cup of tea, whether iced or hot, is a comforting tradition that many cherish. Herbal teas, used medicinally for thousands of years, offer a variety of flavors and health benefits. However, if you take medication, certain herbal teas might interact with both prescription and nonprescription drugs.
What Are Herbal Teas?
Herbal teas differ from “true teas” like black, oolong, green, and white teas, which come from the Camellia sinensis plant. Instead, herbal teas are crafted from various plants’ leaves, stems, roots, fruits, buds, and flowers. Unlike true teas, herbal teas are caffeine-free, says Caroline Thomason, RD, CDCES, a dietitian based in Washington, D.C. They also tend to have a milder or sweeter taste compared to the more bitter flavors of true teas.
Popular herbal tea flavors include apple cinnamon, chamomile, mint, chai, ginger turmeric, elderberry, tulsi, lemon, and rooibos red tea. Lena Bakovic, a registered dietitian nutritionist at Top Nutrition Coaching, notes that most herbal teas are generally safe when consumed in moderation and can be part of a balanced, nutrient-rich diet. However, it’s crucial to check for disclaimers on herbal tea labels recommending consultation with a medical provider if you have a medical condition or take medication. Here are five herbal teas that warrant caution.
1. Ashwagandha
Ashwagandha (Withania somnifera) is known for reducing stress, enhancing well-being, alleviating anxiety, and improving sleep quality. Found in many stress-reducing herbal tea blends, ashwagandha can interact with various medications, including thyroid medications, diabetes medications, blood pressure medications, immunosuppressants, and sedatives. While tea typically contains smaller doses than supplements, regular consumption should still be discussed with a healthcare provider.
2. Ginkgo Biloba
Ginkgo biloba, rich in antioxidant flavonoids, may improve circulation by dilating blood vessels. However, it can slow blood clotting, posing risks when taken with blood thinners or NSAIDs like ibuprofen, increasing bleeding risks. Individuals with bleeding disorders should be cautious about using ginkgo biloba products.
3. St. John’s Wort
St. John’s wort (Hypericum perforatum) is used for treating depression, wound healing, ADHD, and menopausal symptoms. However, it can interfere with many medications, reducing their effectiveness. It can affect SSRIs by increasing serotonin levels, decrease the efficacy of birth control pills, and impact blood thinners by altering blood clotting risks.
4. Goldenseal
Goldenseal (Hydrastis canadensis), also known as yellow root, is used for respiratory infections, hay fever, ulcers, and digestive issues. It can interfere with diabetes medications like metformin, reducing their effectiveness.
5. Chamomile
Chamomile tea, often promoted as a stress-reliever and bedtime tea, can interact with warfarin (a blood thinner) and cyclosporine (an immunosuppressant). Additionally, people with diabetes should monitor their blood sugar levels closely if they consume chamomile tea regularly, as it may have blood sugar-lowering effects.
Tips for Including Herbal Teas in a Healthy Diet
Herbal teas can help you stay hydrated and provide antioxidants and nutrients not found in other foods. Caroline Thomason suggests that herbal teas, being caffeine-free, can be enjoyed anytime, hot or cold. Try brewing a large batch and storing it in the refrigerator for a refreshing drink. Recipes like Herbal Chamomile Health Tonic, Lavender-Chamomile Herbal Tea, or Hibiscus-Pomegranate Iced Tea are great options.
The Bottom Line
Herbal teas are a healthy addition to your diet, offering hydration and antioxidants without caffeine. However, certain herbal teas, such as ashwagandha and ginkgo biloba, can interact with medications. If you regularly consume herbal tea and are concerned about potential interactions with your medications, consult your healthcare provider to ensure it is safe.
By understanding these potential interactions, you can enjoy the benefits of herbal teas while managing your health effectively.
