Drug & supplement interaction

Veronica + Methylene Blue

Methylene Blue brand names: Urolene Blue, Provayblue.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Veronica and Methylene Blue 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.

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Interaction report

Veronica and Methylene Blue

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 Methylene Blue and Veronica 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 Veronica at all — not against Methylene Blue, 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.

Veronica safety at a glance

Veronica overall Use caution Long traditional use but very limited modern safety data, so use cautiously.
Pregnancy Avoid Not enough safety information; avoid during pregnancy.
Breastfeeding Avoid Not enough safety information; avoid while breastfeeding.

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

Still wondering about combining Methylene Blue and Veronica? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Methylene Blue’s Own FDA Label Lists

This is not an interaction — none of it involves Veronica. These are the most notable effects listed in the ADVERSE REACTIONS section of Methylene Blue’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. 6 of them are worth acting on rather than waiting out — marked below.

  • Low magnesium Worth acting on
  • Serotonin syndrome Worth acting on
  • Low potassium Worth acting on
  • Seizures Worth acting on
  • Anemia Worth acting on
  • A severe allergic reaction Worth acting on
  • Diarrhea
  • Headache
  • Nausea

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

Everything else you take

See Every Supplement That Interacts With Methylene Blue

This page covers Veronica only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Methylene Blue page lists 38 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Lithium (major), 5-htp (moderate), Acetyl-l-carnitine (moderate) and Ayahuasca (moderate).

By severity: 2 major · 25 moderate · 11 minor.

From our pharmacist’s overview on the Methylene Blue page

“The pairing I would worry about first with methylene blue (Urolene Blue, Provayblue) is anything that raises serotonin, and lithium heads that group with a major rating. Methylene blue inhibits monoamine oxidase A, the enzyme that breaks serotonin down, so combining it with serotonin-boosting supplements can tip someone into serotonin…”

Reviewed by 2 · Jul 18, 2026

Open the Methylene Blue interaction page

One more smart check

Taking Veronica as Part of a Dietary Supplement Product? Check It for Interactions

We hold 10 real supplement products containing Veronica, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Veronica. Even though Veronica itself has no known interaction with Methylene Blue, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Veronica and Methylene Blue 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 Veronica
Steady interest

#1,044 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Methylene Blue
Top 5%

#53 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. Veronica 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 Veronica reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Veronica and Methylene Blue 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 Veronica

What is Veronica?

Veronica
  • Coughs and respiratory complaints
  • Digestive upset and appetite stimulation
  • Gout, arthritis, and rheumatic complaints
  • Kidney and urinary tract conditions
  • Mouth and throat inflammation (topical)

Veronica (speedwell) is a traditional European herb used mainly for coughs, digestive complaints, and joint problems, but there is very little modern scientific evidence to show it actually works for any of these. It is generally considered mild, but its safety has not been well studied, so check with a pharmacist or doctor before using it — and avoid it during pregnancy and breastfeeding.

Veronica officinalis · Plantaginaceae · Above-ground (aerial) parts — the flowering herb, including leaves and stems · Tea (infusion), tincture, dried herb, and topical rinses or gargles

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

Veronica: dosing

There is no standardized or scientifically established dose for Veronica. Traditional use has mostly involved a tea made from the dried herb or a tincture, but exact safe and effective amounts have not been determined by research.If you use a commercial product, follow the directions on the label and do not exceed the recommended amount.

From our Veronica monograph — the full record covers uses, side effects and every documented interaction.

Read the full Veronica monograph & all interactions
Keep checking

Other Drugs & Veronica

Browse every other medication we’ve checked against Veronica — 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 Veronica 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 Veronica list.

See the full Veronica interactions page
See every supplement checked against Methylene Blue, ranked by severity
Evidence & sources

Veronica References

The 1 sources that drive our Veronica monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Veronica is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Herbs at a Glance — NIH National Center for Complementary and Integrative Health 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 Veronica and Methylene Blue Together: Common Questions

Is it safe to take Veronica with Methylene Blue?
We do not list a known interaction between Veronica and Methylene Blue. 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.
Does Methylene Blue interact with any supplements?
Yes. Methylene Blue has documented interactions with 38 supplements in our database — Veronica is not one of them. The Methylene Blue 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

Veronica monograph Uses, safety profile, and every drug interaction in one place Methylene Blue supplement interactions Every supplement checked against Methylene Blue, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Methylene Blue and Veronica?

Our pharmacists answer your medication & supplement questions — free.

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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.