Nasturtium + Valacyclovir
Valacyclovir brand name: Valtrex.
We found no known interaction between Nasturtium and Valacyclovir 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 two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.
Nasturtium and Valacyclovir
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 Valacyclovir and Nasturtium 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 Nasturtium at all — not against Valacyclovir, 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.
Nasturtium safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Questions About Nasturtium or Valacyclovir
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Nasturtium or Valacyclovir, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:
- Provitalize With Levothyroxine, Valacyclovir, and Citalopram ›
- Is Valacyclovir Safe To Take With Acetaminophen And Guaifenesin? ›
- Alternatives To Valtrex For The Treatment Of Herpes ›
Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.
See Every Supplement That Interacts With Valacyclovir
This page covers Nasturtium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Valacyclovir page lists 27 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), African Wild Potato (moderate), Banderol (moderate), Biofeedback (moderate) and Caffeic Acid (moderate).
By severity: 1 major · 17 moderate · 9 minor.
From our pharmacist’s overview on the Valacyclovir page
“Valacyclovir (Valtrex) works against herpes outbreaks only if enough of it gets absorbed into your blood, and most of this list threatens exactly that. Of the 27 supplements on file, 17 can change how well oral medicines like this one are absorbed, and the single major-rated entry, activated charcoal, binds drugs in the gut outright.”
Reviewed by 2 · Jul 18, 2026
Taking Nasturtium as Part of a Dietary Supplement Product? Check It for Interactions
We hold 3 real supplement products containing Nasturtium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Nasturtium. Even though Nasturtium itself has no known interaction with Valacyclovir, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Nasturtium and Valacyclovir 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.
#309 of 1,452 supplements looked up here in the last 7 days
#31 of 2,830 medications looked up here in the last 7 days
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.
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Nasturtium reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Nasturtium and Valacyclovir records this page draws on were last updated July 10, 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.
About Nasturtium
What is Nasturtium?
- Urinary tract infections
- Respiratory infections and congestion
- Antimicrobial support
- Wound and skin care (topical)
- Mild cold and cough symptoms
Nasturtium is an edible garden plant traditionally used for urinary and respiratory infections, often combined with horseradish in herbal products. Some lab studies suggest it has antimicrobial activity, but high-quality human evidence is limited. Talk with your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or have kidney or stomach problems.
Tropaeolum majus · Tropaeolaceae · Leaves, flowers, and seeds · Fresh leaves and flowers (food/salad), dried herb, tea, capsules, tinctures, and combination herbal products
An interaction check asks whether these two react with each other — it does not ask whether Nasturtium is a good idea for someone in your situation. Here is what our Nasturtium record says about it on its own.
Nasturtium: dosing
There is no well-established standardized dose for nasturtium. Amounts vary widely depending on whether you use fresh leaves, dried herb, tea, capsules, or a combination product.The best approach is to follow the directions on the product label and not exceed the recommended amount.
From our Nasturtium monograph — the full record covers uses, side effects and every documented interaction.
About Valacyclovir
What Is Valacyclovir Used For?
Brand name: Valtrex
Valacyclovir tablets are used in adults to treat cold sores (herpes labialis), genital herpes (initial and recurrent episodes), and shingles (herpes zoster). They can also be taken daily as suppressive therapy to reduce how often genital herpes outbreaks occur, and to lower the risk of passing genital herpes to a partner.
In children and adolescents, valacyclovir tablets are used to treat cold sores in those aged 12 and older, and chickenpox in those aged 2 to under 18. Valacyclovir has not been established as safe and effective for most uses in immunocompromised patients, with the exception of suppressive therapy for genital herpes in HIV-infected adults.
Most-Reported Side Effects for Valacyclovir
From FAERS, the FDA’s public side-effect reporting system (70,056 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Nasturtium
Browse every other medication we’ve checked against Nasturtium — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Nasturtium against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Tadalafil ›
- Acetaminophen ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Tirzepatide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Acyclovir ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Lamotrigine ›
- Fluoxetine ›
- Methotrexate ›
- Acetaminophen, Codeine ›
- Gabapentin ›
- Amphetamine ›
- Pregabalin ›
- Isotretinoin ›
- Dextroamphetamine ›
- Azithromycin ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Amlodipine Besylate ›
- Methylene Blue ›
- Duloxetine ›
- Letrozole ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
- Naproxen ›
- Bisoprolol ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Nasturtium list.
Nasturtium References
The 5 references that drive our Nasturtium monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
- Fintelmann V, Albrecht U, Schmitz G, Schnitker J. Efficacy and safety of a combination herbal medicinal product containing Tropaeoli majoris herba and Armoraciae rusticanae radix for the prophylactic treatment of patients with respiratory tract diseases:
- Albrecht U, Goos KH, Schneider B. A randomised, double-blind, placebo-controlled trial of a herbal medicinal product containing Tropaeoli majoris herba (Nasturtium) and Armoraciae rusticanae radix (Horseradish) for the prophylactic treatment of patients w
- Perez-Crespo M, Silvestre JF, Mataix J, Ballester I, Toledo F, Betlloch I. Contact dermatitis due to nasturtium. Contact Dermatitis. 2009;60(4):229-30. PubMed
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.
Taking Nasturtium and Valacyclovir Together: Common Questions
Is it safe to take Nasturtium with Valacyclovir?
Do Nasturtium and Valacyclovir have any of the same side effects?
Does Valacyclovir interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.