Medication interaction hub

What Supplements Interact with Methohexital?

Methohexital brand name: Brevital Sodium. Every interaction below applies to the brands too.

5 Interactions 1 Major 4 Moderate
Curated & coded by · Clinical Pharmacist · Updated September 22, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Methohexital? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Methohexital against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Methohexital (Brevital Sodium) is a fast-acting barbiturate anesthetic used to put patients to sleep for brief procedures, and that raises the stakes of this list, because you cannot report a problem once you are under. All five supplements on file interact with the anesthesia itself, and the one rated major, fever bark, deserves your attention first. It contains reserpine, a compound linked to unstable blood pressure and heart function during general anesthesia.

The four moderate entries continue the same theme. Regular cannabis or THC use may change how much anesthetic it takes to keep you asleep, cowhage carries a theoretical arrhythmia risk with certain anesthetics, and Datura wrightii slows breathing on its own, an effect that can stack fatally with an anesthetic. None of this can be sorted out mid-procedure, so the useful move is telling the anesthesia team everything you take well before the day arrives.

— , Clinical Pharmacist · July 18, 2026

Major 1 Moderate 4 No known interaction 1,447

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Methohexital: Top Interactions at a Glance

The most significant Methohexital supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 5 highest-ranked of 5 interacting ingredients — plus 1,447 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Methohexital + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Probable Fever Bark + Methohexitali

Theoretically, fever bark might increase the risk of cardiovascular instability with general anesthesia.

Read the full interaction
The complete list

Every Supplement Checked Against Methohexital

All 1,452 ingredients in our database, ranked by severity — 5 with a Methohexital interaction on file and 1,447 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Methohexital?

One-line answers, one card per combination — scroll through today’s 10 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Fever Bark with Methohexital?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, fever bark might increase the risk of cardiovascular instability with general anesthesia.

Full Fever Bark + Methohexital answer

Can you take Cannabis with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Cannabis use might alter the safety and clinical effects of various forms of anesthesia.

Full Cannabis + Methohexital answer

Can you take Cowhage with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use of cowhage and anesthesia might increase the risk of arrhythmias.

Full Cowhage + Methohexital answer

Can you take Datura Wrightii with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Datura wrightii causes respiratory depression.

Full Datura Wrightii + Methohexital answer

Can you take Delta-9-tetrahydrocannabinol (thc) with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. THC use might alter the safety and clinical effects of various forms of anesthesia.

Full Delta-9-tetrahydrocannabinol (thc) + Methohexital answer

Can you take Fever Bark with Methohexital?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, fever bark might increase the risk of cardiovascular instability with general anesthesia.

Full Fever Bark + Methohexital answer

Can you take Cannabis with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Cannabis use might alter the safety and clinical effects of various forms of anesthesia.

Full Cannabis + Methohexital answer

Can you take Cowhage with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use of cowhage and anesthesia might increase the risk of arrhythmias.

Full Cowhage + Methohexital answer

Can you take Datura Wrightii with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Datura wrightii causes respiratory depression.

Full Datura Wrightii + Methohexital answer

Can you take Delta-9-tetrahydrocannabinol (thc) with Methohexital?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. THC use might alter the safety and clinical effects of various forms of anesthesia.

Full Delta-9-tetrahydrocannabinol (thc) + Methohexital answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Methohexital is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Methohexital, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Methohexital sits in 1 interaction category. Open any one to see what the group means:

Anesthesia 5 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

5 of the supplement ingredients on this page reach Methohexital through this category.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Methohexital

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Methohexital.

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Pharmacist Counseling Corner

Methohexital & Supplements: Common Questions

What supplements interact with Methohexital?
More than you might expect — 5 in total, though they are far from equal: 1 are rated major, 4 moderate, and 0 minor. The ranked list on this page puts the ones that genuinely matter first, and every entry opens a full report on that exact pair. The highest-ranked right now: Fever Bark, Cannabis, Cowhage.
Which Methohexital supplement interactions are the most serious?
The 1 major-rated combination — led by Fever Bark — deserve real caution: these are the ones generally best avoided, or used only with your prescriber watching. If you take any of them today, don't panic and don't stop anything abruptly — call your pharmacist first. Jump to the ranked list.
Can I take vitamins or supplements while on Methohexital?
Usually yes — most people on Methohexital can take most supplements. The catch is the exceptions, and they aren't always the exotic ones (St. John's Wort trips up more prescriptions than almost anything sold next to it). Look up each ingredient you actually take in the list above, and treat "no known interaction" as a green-ish light, not a guarantee. Try the label scanner or the interaction checker.
Do brands like Brevital Sodium have the same supplement interactions as Methohexital?
Yes — Brevital Sodium all contain Methohexital, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Methohexital and my other medications?
This page covers Methohexital against supplements and herbal ingredients. Checking Methohexital against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker.

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

Where next

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 22, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.