Drug & supplement interaction

Animal-assisted Therapy + Acyclovir

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

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

We found no known interaction between Animal-assisted Therapy 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. 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.

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Interaction report

Animal-assisted Therapy 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 Animal-assisted Therapy in our sources. This does not guarantee that the combination is completely free of risk — research on Animal-assisted Therapy alongside specific medications may be limited.

Worth understanding: our licensed dataset holds no drug-interaction record for Animal-assisted Therapy 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.

Animal-assisted Therapy is a treatment rather than something you take. Tell whoever provides it which medicines you use, and ask your prescriber whether it is appropriate for your health and treatment. 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.

Animal-assisted Therapy safety at a glance

Animal-assisted Th... overall Use caution Generally low-risk when supervised, but allergies, infection risk, and animal safety must be considered.
Pregnancy Use caution Usually fine, but be careful around animals that may carry infections; check with your doctor.
Breastfeeding Use caution No direct concern for the baby, but practice good hygiene around animals.

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

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

No Interaction Found — But Data Suggests Animal-assisted Therapy and Acyclovir May Share a Side Effect

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so having Animal-assisted Therapy while taking the medicine can make those effects more likely to turn up, and harder to pin on one or the other if they do. One of them is worth acting on rather than waiting out — marked below.

  • A higher chance of infection Worth acting on reported in 5.0% of FDA reports for Acyclovir Additional detail

    Animal-assisted Therapy

    “Animal-assisted therapy (AAT) is generally well tolerated, with few adverse effects reported. However, a thorough evaluation of safety outcomes has not been conducted.

    Serious Adverse Effects (Rare):

    Transmission of zoonotic diseases to patients, particularly those prone to infection. With equine therapy, falling and low back pain.”

    Animal-assisted Therapy · Natural Medicines adverse-effect record, reported in back pain.

    Acyclovir

    Listed in the ADVERSE REACTIONS section of the FDA label for Acyclovir, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Reported for Animal-assisted Therapy but not commonly for Acyclovir: back pain.

Effects for Acyclovir come from the ADVERSE REACTIONS section of its FDA label; effects for Animal-assisted Therapy come from the Natural Medicines adverse-effect record, quoted above. 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. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

From our Q&A

Questions About Animal-assisted Therapy 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 Animal-assisted Therapy 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 Animal-assisted Therapy 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

How much people look this up

Where Animal-assisted Therapy 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 Animal-assisted Therapy
Steady interest

#1,424 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.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Animal-assisted Therapy reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Animal-assisted Therapy and Acyclovir 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.
Data structure & sourcing designed and verified by .
Treatment approach

About Animal-assisted Therapy

What is Animal-assisted Therapy?

  • Anxiety and stress
  • Depression and low mood
  • Loneliness and social isolation
  • Pain and comfort during hospital stays
  • Support for children with autism or developmental needs
  • Rehabilitation and physical therapy motivation

Animal-assisted therapy uses trained animals, guided by professionals, to support emotional and physical well-being. Many people find it comforting and it appears generally low-risk, but high-quality evidence for treating specific medical conditions is still limited. It is best used alongside, not instead of, standard medical care.

Not applicable (this is a therapy, not an herb or supplement) · Sessions with trained therapy animals such as dogs, horses, cats, or other animals, guided by a handler or health professional

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

Animal-assisted Therapy: dosing

There is no standard dose for animal-assisted therapy. The number, length, and frequency of sessions are usually tailored to the person and their goals by the therapist or program running it.If you are interested in AAT, ask about programs run through reputable hospitals, clinics, or certified therapy-animal organizations. A pharmacist or doctor can help you decide if it is a reasonable addition to your care, especially if you have allergies or a weakened immune system.

From our Animal-assisted Therapy monograph — the full record covers uses, side effects and every documented interaction.

Read the full Animal-assisted Therapy 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 & Animal-assisted Therapy

Browse every other medication we’ve checked against Animal-assisted Therapy — 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 Animal-assisted Therapy 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 Animal-assisted Therapy list.

See the full Animal-assisted Therapy interactions page
See every supplement checked against Acyclovir, ranked by severity
Evidence & sources

Animal-assisted Therapy References

The 3 references that drive our Animal-assisted Therapy 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.

  1. Kwon JY, Chang HJ, Yi SH, Lee JY, Shin HY, Kim YH. Effect of hippotherapy on gross motor function in children with cerebral palsy: a randomized controlled trial. J Altern Complement Med. 2015;21(1):15-21. PubMed
  2. Jang B, Song J, Kim J, et al. Equine-assisted activities and therapy for treating children with attention-deficit/hyperactivity disorder. J Altern Complement Med. 2015;21(9):546-53. PubMed
  3. Vermöhlen V, Schiller P, Schickendantz S, et al. Hippotherapy for patients with multiple sclerosis: A multicenter randomized controlled trial (MS-HIPPO). Mult Scler. 2018;24(10):1375-1382. 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.

Pharmacist Counseling Corner

Having Animal-assisted Therapy While Taking Acyclovir: Common Questions

Is it safe to have Animal-assisted Therapy while taking Acyclovir?
We do not list a known interaction between Animal-assisted Therapy 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.
Do Animal-assisted Therapy and Acyclovir have any of the same side effects?
Yes — our sources link each of them separately to one of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Does Acyclovir interact with any supplements?
Yes. Acyclovir has documented interactions with 37 supplements in our database — Animal-assisted Therapy 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

Animal-assisted Therapy 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Acyclovir and Animal-assisted Therapy?

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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.