Guide · Last updated: November 2026

Shilajit and medication: what is known about interactions

Interactions between Shilajit and medication have hardly been studied, which does not mean they are ruled out. The most important known point: humic acids can bind drug substances in the gut, which may reduce how well a medicine works. Anyone who takes medication regularly, has high blood pressure or a thyroid condition should check with a doctor or pharmacist before starting.

Contents

You take a medicine every day and wonder whether Shilajit fits alongside it? The honest answer is that hardly anyone has studied this. This page sets out what is known, what is only assumed, and how to handle the gap in between.

At a glance

Question	State of knowledge
Are there interaction studies?	Hardly any, systematic human studies are missing
What is known?	Humic acids can bind drug substances in the gut
What is documented?	One case report with high blood pressure and low potassium
What does it mean for you?	On regular medication, ask a doctor or pharmacist first

Why there is so little data

In Germany and the rest of the EU, Shilajit is sold as a food supplement, which legally makes it a food. Foods do not go through approval trials in which interactions with medicines are tested systematically. The few human studies on Shilajit are small, last weeks to a few months, and almost always enrolled healthy volunteers who were not on long-term medication.

Missing data is not a clean bill of health. It does not mean there are no interactions, only that nobody has reliably ruled them out. How thin the evidence is overall is covered in Is Shilajit safe?.

The known mechanism: binding in the gut

A large share of Shilajit consists of humic substances, meaning fulvic acid and humic acid. The German consumer advice organisation Verbraucherzentrale (page in German) points out that humic acids can bind not only unwanted substances in the gut but also nutrients and drug substances. This can reduce the uptake of nutrients and the effectiveness of medication.

How strong this is for any particular medicine has not been measured. A time gap that is reliably long enough has not been studied for Shilajit either, so a blanket rule such as "two hours apart is enough" cannot be given honestly. A pharmacist can tell you how sensitive your specific medicine is to this kind of binding.

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Medicines that call for extra care

The table below does not list proven interactions. It shows where asking first matters most, and why.

Type of medicine	Why caution	Evidence on Shilajit
Blood pressure medication, diuretics	Case report with high blood pressure and low potassium	one single case, no studies
Thyroid hormones (levothyroxine)	Absorption in the gut is easily disturbed by other substances	not studied
Anticoagulants, epilepsy medication, immunosuppressants	Even small changes in absorption can matter	not studied
Diabetes medication	Blood sugar is tightly managed	not studied
Cholesterol-lowering medication	One small study on blood lipids, none on combinations	hardly studied
Iron and mineral supplements	Possible binding of nutrients	not studied

More on blood lipids and cholesterol-lowering medication is in Shilajit and blood values.

Shilajit and blood pressure

On blood pressure there is exactly one source that gets cited again and again. The case report by Stavropoulos et al., 2018 describes a 37-year-old pregnant woman with persistently high blood pressure and low potassium after six months of taking mumijo.

One case does not prove a link for everyone. It is, however, the reason why people with high blood pressure, cardiovascular disease or kidney disease should only take Shilajit after medical advice. That applies in particular if you take diuretics, because they can also change potassium levels.

The reverse question, whether Shilajit lowers blood pressure, has a short answer: there is no authorised health claim under Regulation (EC) No 1924/2006 and no controlled human study with that aim. Forum anecdotes do not help, because the product, the amount and other medication are almost never known.

Shilajit and the thyroid

We found no human study on the thyroid, neither on side effects nor on any benefit. Statements in either direction that circulate online are not backed by evidence.

The thyroid matters for a different reason. Thyroid hormones such as levothyroxine are known to be sensitive: their absorption in the gut is already disturbed by iron or calcium supplements, which is why they are taken on an empty stomach and apart from other products. A mixture that can bind drug substances should therefore always be discussed with your doctor first if you are on this therapy. Never skip thyroid tablets on your own.

Who should not take Shilajit

There is no legal ban on taking it. These groups should nevertheless not take it without medical advice:

Group	Reason
Pregnant and breastfeeding women	no safety data, case report during pregnancy
Children and teenagers	no data
People with high blood pressure, heart, kidney or liver disease	interactions with the condition not studied
People with thyroid conditions	no data, sensitive hormone therapy
Anyone on long-term medication	possible binding of drug substances

More on pregnancy is under Shilajit during pregnancy and breastfeeding, more on risk groups in the article on possible side effects.

What to do if you take medication

Ask before, not after. Tell your doctor or pharmacist the product, the daily amount and every medicine you take.
Do not stop anything. A food supplement does not replace prescribed treatment.
Discuss timing. Whether a gap to your medicine makes sense, and how long, is a question for the pharmacy.
Watch your readings. If you already monitor blood pressure, blood sugar or clotting, look out for changes after starting.
Pause if something changes. Stop taking Shilajit and contact your doctor if your readings or how you feel change.

How doctors and authorities view Shilajit overall is covered in What do doctors and authorities say about Shilajit?.

What a lab analysis settles and what it does not

A batch analysis shows what is in the product, heavy metals for example. It says nothing about interactions with medication. Our batch HM-SH-25-BLY-1159 was tested by a food laboratory in Germany accredited for heavy metals and microbiology; all values are on the lab values page and in the batch datasheet.

Our plan is meant for healthy adults: 400 mg a day for 50 days, then 10 days rest, described under Shilajit dosage. The 20 g jar is available in the shop for €34.00. More topics are in the guide section.

Food supplements are not a substitute for a balanced and varied diet.

Frequently asked questions

Can Shilajit raise blood pressure?

That is not proven, but there is one signal. A published case report describes a pregnant woman with persistently high blood pressure and low potassium after six months of taking mumijo. A single case does not prove a link for everyone. If you have high blood pressure or take blood pressure medication, only take Shilajit after talking to your doctor, and keep an eye on your readings.

Can Shilajit lower blood pressure?

There is no authorised health claim for this in the EU and no controlled human study that set out to test it. Shilajit is not a treatment for high blood pressure. Never stop prescribed blood pressure medication on your own or swap it for a food supplement.

What do people with high blood pressure report about Shilajit?

Nobody has collected this systematically. Reports in forums and on social media cannot be verified: the product, amount, duration and other medication usually stay unclear. The medical literature documents one single case with high blood pressure and low potassium. For your own decision, the conversation with your doctor counts, not other people's anecdotes.

What side effects can Shilajit have on the thyroid?

There are no human studies on this, neither on side effects nor on any benefit. A different point matters: thyroid hormones such as levothyroxine are easily bound by other substances in the gut, and humic acids can bind drug substances. If you take thyroid tablets or have a thyroid condition, check with your doctor before taking Shilajit.

Who should not take Shilajit?

There is no legal ban for particular groups, because Shilajit is sold as a food. Without medical advice it should not be taken by pregnant or breastfeeding women, children and teenagers, people with chronic conditions such as high blood pressure, kidney, liver or thyroid disease, and anyone on regular medication. This applies most of all to medicines where small changes in absorption matter, such as anticoagulants or thyroid hormones.