Drug & supplement interaction

Tetrahydrocannabivarin (thcv) + Ethambutol

Ethambutol brand names: Myambutol, Etibi.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Tetrahydrocannabivarin (thcv) and Ethambutol in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Ethambutol states a food rule worth keeping to.

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Interaction report

Tetrahydrocannabivarin (thcv) and Ethambutol

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Ethambutol and Tetrahydrocannabivarin (thcv) in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Tetrahydrocannabivarin (thcv) at all — not against Ethambutol, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Tetrahydrocannabivarin (thcv) safety at a glance

Tetrahydrocannabiv... overall Use caution Human safety data are limited, and product quality and legality vary a lot.
Pregnancy Avoid Cannabis-derived compounds are not considered safe in pregnancy.
Breastfeeding Avoid Cannabinoids can pass into breast milk, so avoid use while nursing.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Ethambutol and Tetrahydrocannabivarin (thcv)? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Ethambutol’s Own FDA Label Lists

This is not an interaction — none of it involves Tetrahydrocannabivarin (thcv). These are the most notable effects listed in the ADVERSE REACTIONS section of Ethambutol’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • Loss of vision Worth acting on
  • Hallucinations Worth acting on
  • Confusion Worth acting on
  • A severe skin reaction Worth acting on
  • A low platelet count Worth acting on
  • Kidney problems Worth acting on
  • A severe allergic reaction Worth acting on
  • A low white blood cell count Worth acting on
  • Liver problems Worth acting on
  • An allergic reaction Worth acting on

Showing the 10 most notable of 24 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Ethambutol. Read the label on DailyMed › Tetrahydrocannabivarin (thcv)’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Tetrahydrocannabivarin (thcv) side to compare — that is a limit of the record, not a statement that Tetrahydrocannabivarin (thcv) has no side effects.

How to take them

Some Ethambutol Products Have a Food Rule — Tetrahydrocannabivarin (thcv) Should Not Break It

At least one FDA label for a product containing Ethambutol says to take it with food. If you take Tetrahydrocannabivarin (thcv) on an empty stomach out of habit, keep them separate — and take Ethambutol with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Ethambutol products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Absorption is not significantly altered by administration with food.

From the Dosage and Administration section of the FDA label we read for Ethambutol — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Ethambutol

This page covers Tetrahydrocannabivarin (thcv) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ethambutol page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

Open the Ethambutol interaction page

How much people look this up

Where Tetrahydrocannabivarin (thcv) and Ethambutol Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Tetrahydrocannabivarin (thcv)
Steady interest

#873 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Ethambutol
Steady interest

#2,769 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions. Tetrahydrocannabivarin (thcv) is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Tetrahydrocannabivarin (thcv) reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Tetrahydrocannabivarin (thcv) and Ethambutol records this page draws on were last updated June 22, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Tetrahydrocannabivarin (thcv)

What is Tetrahydrocannabivarin (thcv)?

  • Appetite control and weight management
  • Blood sugar support
  • Energy and focus
  • General wellness

Tetrahydrocannabivarin (THCV) is a minor cannabinoid found in cannabis that is being studied for appetite, metabolism, and blood sugar, but human evidence is very limited. Product quality, legal status, and dosing vary widely, so talk with your pharmacist or doctor before trying it, and avoid it during pregnancy and breastfeeding.

Cannabis sativa · Cannabaceae · Flowers and leaves of the cannabis plant (THCV is an extracted or isolated cannabinoid) · Oils, tinctures, capsules, gummies, vape products, and isolated extracts

An interaction check asks whether these two react with each other — it does not ask whether Tetrahydrocannabivarin (thcv) is a good idea for someone in your situation. Here is what our Tetrahydrocannabivarin (thcv) record says about it on its own.

Tetrahydrocannabivarin (thcv): dosing

There is no established standard dose for THCV. Research is too limited to recommend a specific milligram amount, and effects may even differ between low and high doses.If you choose to try a product, follow the directions on the label and start with the lowest amount.

From our Tetrahydrocannabivarin (thcv) monograph — the full record covers uses, side effects and every documented interaction.

Read the full Tetrahydrocannabivarin (thcv) monograph & all interactions
Medication

About Ethambutol

What Is Ethambutol Used For?

Brand names: Myambutol, Etibi

Ethambutol hydrochloride tablets are used to treat pulmonary tuberculosis — TB that affects the lungs. It must always be taken with at least one other anti-TB medication, never on its own.

For people being treated for TB for the first time, ethambutol is commonly paired with isoniazid, or with isoniazid and streptomycin. For people who have been treated for TB before, it is combined with other second-line anti-TB drugs chosen based on which medicines the bacteria are still sensitive to.

See full Ethambutol drug information
Keep checking

Other Drugs & Tetrahydrocannabivarin (thcv)

Browse every other medication we’ve checked against Tetrahydrocannabivarin (thcv) — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Tetrahydrocannabivarin (thcv) against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Tetrahydrocannabivarin (thcv) list.

See the full Tetrahydrocannabivarin (thcv) interactions page
See every supplement checked against Ethambutol, ranked by severity
Evidence & sources

Tetrahydrocannabivarin (thcv) References

The 2 sources that drive our Tetrahydrocannabivarin (thcv) monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Tetrahydrocannabivarin (thcv) is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Cannabis (Marijuana) and Cannabinoids: What You Need To Know — NIH NCCIH Source
  2. Marijuana — MedlinePlus Source

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Tetrahydrocannabivarin (thcv) and Ethambutol Together: Common Questions

Is it safe to take Tetrahydrocannabivarin (thcv) with Ethambutol?
We do not list a known interaction between Tetrahydrocannabivarin (thcv) and Ethambutol. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Should I take Tetrahydrocannabivarin (thcv) and Ethambutol at the same time of day?
At least one FDA label for a product containing Ethambutol says to take it with food. If you take Tetrahydrocannabivarin (thcv) on an empty stomach out of habit, keep them separate and take Ethambutol with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Ethambutol products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Does Ethambutol interact with any supplements?
Yes. Ethambutol has documented interactions with 17 supplements in our database — Tetrahydrocannabivarin (thcv) is not one of them. The Ethambutol interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Tetrahydrocannabivarin (thcv) monograph Uses, safety profile, and every drug interaction in one place Ethambutol drug information The full plain-English guide to this medication Ethambutol supplement interactions Every supplement checked against Ethambutol, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Ethambutol and Tetrahydrocannabivarin (thcv)?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.