Can I Drink Essiac Tea With My Blood Pressure and Thyroid Meds?
A reader taking nebivolol and losartan for blood pressure, along with levothyroxine after thyroid removal, asks whether they can drink Essiac tea safely.
Hello. I take nebivolol 5 mg and losartan 100 mg (though I have recently cut those doses in half most days) for blood pressure, and I have recently had my thyroid removed and am taking levothyroxine 88 mg (which I take at 3 AM to separate it from food and other meds by 4 hours). I am very interested in trying Essiac tea. Can I use it if I take it a few hours from these meds?
Jul 16, 2026- Essiac tea has no known direct interactions with your blood pressure and thyroid medications. Separating the tea from your medications by a few hours is recommended because slippery elm in the blend could theoretically reduce medication absorption. Your current practice of taking levothyroxine at 3 AM on an empty stomach is ideal for consistent absorption and works well with your other medications.
Hello, and thank you for trusting HelloPharmacist with this one! I’m happy to answer this for you.
Yes, drinking Essiac tea a few hours apart from your medications is a sensible approach, and none of the herbs in Essiac tea are known to interact directly with nebivolol, losartan, or levothyroxine. There are a few things I need to explain in detail though, which I do in the sections below.
Slippery Elm and Medication Absorption
Essiac is a blend rather than a single herb, and while recipes vary, it typically contains four main ingredients: burdock root, sheep sorrel, slippery elm bark, and Turkish (turkey) rhubarb root.
Of these, slippery elm is the one that matters most for timing.
Slippery elm bark contains a gummy substance called mucilage that coats the digestive tract, and in theory this coating could slow or reduce the absorption of any medication taken by mouth at the same time.
This is considered a theoretical, moderate concern rather than a proven problem, and the small amount of slippery elm in a cup of Essiac tea is unlikely to cause trouble on its own, but separating the tea from your pills is still the smart move.
We have interaction pages covering this for both slippery elm with levothyroxine and slippery elm with nebivolol if you'd like more detail (I put links at the end of this answer).
The Other Herbs in the Blend
Burdock root hasn't been well studied for drug interactions, but it has no known interaction with beta-blockers like nebivolol, losartan, or levothyroxine, and it isn't known to meaningfully affect blood pressure or heart rate.
Sheep sorrel is similar in that data are thin, though it doesn't have any documented interaction with your medications; it is high in oxalates, so heavy, regular use may not be ideal for anyone prone to kidney stones.
Turkish rhubarb root contains anthraquinone compounds that act as a stimulant laxative. Used occasionally this isn't a concern, but heavy or long-term use of stimulant laxatives can cause loose stools and, over time, shifts in electrolytes such as potassium, which is worth keeping in mind when you take blood pressure medications.
Moderate, occasional use of the tea isn't expected to cause problems here.
Your Timing Plan Around Levothyroxine
Your current routine is honestly better than what most people manage as it concerns levothyroxine!
Levothyroxine is finicky about absorption. It is a narrow therapeutic index drug, which means that a small change in dose/absorption can make a big impact on how it works for you.
Due to this, it is recommended to be taken on an empty stomach, first thing in the morning, away from food and other medications.
Taking it at 3 AM on an empty stomach as you said you do, well away from food and other medications, that will certainly ensure consistent absorption.
For what it's worth, your three prescriptions also get along well with each other; studies with nebivolol found no pharmacokinetic interaction with either losartan or levothyroxine
Final words
Enjoying Essiac tea a few hours apart from your medications is a reasonable plan, and your careful levothyroxine timing already covers the main concern with this blend.
Thanks again for using HelloPharmacist!
Here are some links to some of the topics I talked about in this answer:
References & sources
Glossary — Terms in This Answer
- Nebivolol
- A type of heart medication called a beta-blocker used to treat high blood pressure and heart conditions.
- Losartan
- A blood pressure medication that works by relaxing blood vessels to help lower blood pressure.
- Levothyroxine
- A synthetic thyroid hormone used to treat an underactive thyroid gland.
- Mucilage
- A slippery, gummy substance that coats and soothes the digestive tract.
- Absorption
- The process by which the body takes in a medication through the digestive system into the bloodstream.
- Anthraquinone
- A chemical compound in rhubarb that acts as a natural laxative to stimulate bowel movements.
- Narrow therapeutic index
- A characteristic of medications where the difference between an effective dose and a harmful dose is very small.
- Pharmacokinetic
- Relating to how the body absorbs, distributes, breaks down, and eliminates a medication.
Dr. Brian Staiger, PharmD
Doctor of Pharmacy, board certified clinical pharmacist (BCPS), American Herbalist Guild, Medication Therapy Management certified
Brian Staiger, PharmD, BCPS, is a licensed pharmacist with more than 13 years of experience across retail pharmacy, clinical pharmacy, medication safety, pharmacy program development, and healthcare administration. He is the founder of HelloPharmacist.com, where he helps patients...
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