Drug & supplement interaction

Canaigre + Acyclovir

Acyclovir brand names: Zovirax, Zovirax Injection, Sitavig, Avaclyr.

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 Canaigre and Acyclovir 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

Canaigre and Acyclovir

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 Acyclovir and Canaigre 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 Canaigre at all — not against Acyclovir, 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.

Canaigre safety at a glance

Canaigre overall Use caution Limited safety data and high tannin content mean it should be used cautiously, if at all.
Pregnancy Avoid Not enough safety information; avoid use during pregnancy.
Breastfeeding Avoid Not enough safety information; avoid use while breastfeeding.

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

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

What Acyclovir’s Own FDA Label Lists

This is not an interaction — none of it involves Canaigre. These are the most notable effects listed in the ADVERSE REACTIONS section of Acyclovir’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. 4 of them are worth acting on rather than waiting out — marked below.

  • Low mood Worth acting on
  • Kidney problems Worth acting on
  • A higher chance of infection Worth acting on mentioned in 5.0% of FDA reports for Acyclovir
  • Bleeding or bruising Worth acting on
  • Joint pain
  • Tiredness mentioned in 7.0% of FDA reports for Acyclovir
  • Stomach pain
  • A skin rash mentioned in 3.7% of FDA reports for Acyclovir
  • Dizziness
  • Nausea mentioned in 4.9% of FDA reports for Acyclovir

Showing the 10 most notable of 12 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 Acyclovir. Read the label on DailyMed › Where a percentage is shown, it is the share of 114,761 voluntary FDA FAERS reports for Acyclovir that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Canaigre’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Canaigre side to compare — that is a limit of the record, not a statement that Canaigre has no side effects.

From our Q&A

Questions About Canaigre or Acyclovir

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Canaigre or Acyclovir, 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:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Acyclovir

This page covers Canaigre only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acyclovir page lists 37 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Siberian Cocklebur (major), African Wild Potato (moderate) and Aristolochia (moderate).

By severity: 3 major · 23 moderate · 11 minor.

From our pharmacist’s overview on the Acyclovir page

“Kidney strain is the risk to understand first. Acyclovir (Zovirax) can stress the kidneys on its own, and a few ingredients here, Siberian cocklebur especially, are toxic to kidney tissue, so pairing them could compound the harm.”

Reviewed by 2 · Jul 18, 2026

Open the Acyclovir interaction page

One more smart check

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

We hold 2 real supplement products containing Canaigre, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Canaigre. Even though Canaigre itself has no known interaction with Acyclovir, 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 Canaigre and Acyclovir 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 Canaigre
Top half

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

29 days ago today
Medication Acyclovir
Top 5%

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

What is Canaigre?

  • Sore throat and mouth irritation
  • Skin wounds and inflammation
  • Digestive complaints
  • Source of tannins (astringent)
  • Marketed as a 'wild red American ginseng'

Canaigre (Rumex hymenosepalus) is a desert plant whose tannin-rich root has been used traditionally as an astringent for sore throats, skin problems, and digestive complaints. There is very little human research to support any of these uses, and the root naturally contains tannins and may contain compounds of safety concern, so it is best approached with caution and under professional guidance.

Rumex hymenosepalus · Polygonaceae · Root (tuber) · Capsules, powder, dried root, topical preparations

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

Canaigre: dosing

There is no established or standardized dose for canaigre. Because it has not been studied in proper clinical trials, no one can say what amount is both safe and effective.If you choose to use a commercial product, follow the directions on the label and do not take more than recommended.

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

Read the full Canaigre monograph & all interactions
Medication

About Acyclovir

What Is Acyclovir Used For?

Brand names: Zovirax, Zovirax Injection, Sitavig, Avaclyr

Acyclovir treats infections caused by herpes viruses. Depending on the form, it is used for cold sores (herpes labialis), genital herpes (initial episodes and recurrent flare-ups), shingles (herpes zoster), and chickenpox (varicella). It can also be used long-term to suppress recurrent genital herpes outbreaks.

Some forms are approved for more serious situations: acyclovir injection is used in hospital settings for herpes simplex encephalitis (herpes infection of the brain), neonatal herpes (in newborns), and herpes or shingles infections in immunocompromised patients. Avaclyr ophthalmic ointment is specifically indicated for acute herpetic keratitis (a herpes ulcer on the cornea of the eye). Sitavig buccal tablet and Zovirax cream are specifically indicated for recurrent cold sores in immunocompetent adults.

Most-Reported Side Effects for Acyclovir

From FAERS, the FDA’s public side-effect reporting system (114,761 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 8,029 reports
Diarrhea 7,348 reports
Pneumonia 5,700 reports
Nausea 5,643 reports
Fever 4,989 reports
See full Acyclovir drug information
Keep checking

Other Drugs & Canaigre

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

See the full Canaigre interactions page
See every supplement checked against Acyclovir, ranked by severity
Evidence & sources

Canaigre References

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

  1. Tannins — 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 Canaigre and Acyclovir Together: Common Questions

Is it safe to take Canaigre with Acyclovir?
We do not list a known interaction between Canaigre and Acyclovir. 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 Acyclovir interact with any supplements?
Yes. Acyclovir has documented interactions with 37 supplements in our database — Canaigre is not one of them. The Acyclovir 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

Canaigre monograph Uses, safety profile, and every drug interaction in one place Acyclovir drug information The full plain-English guide to this medication Acyclovir supplement interactions Every supplement checked against Acyclovir, 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 Acyclovir and Canaigre?

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.