Drug & supplement interaction

Jamaican Dogwood + Ethosuximide

Ethosuximide brand name: Zarontin.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Jamaican Dogwood has a moderate interaction with Ethosuximide. Jamaican dogwood may potentiate sedative effects.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Jamaican Dogwood and Ethosuximide

Here is the interaction we found between these two, with the evidence behind it.

Moderate

CNS DEPRESSANTS

Why this applies to Ethosuximide

Ethosuximide falls under CNS DEPRESSANTS — the group Jamaican Dogwood interacts with.

Jamaican dogwood may potentiate sedative effects.
Severity Moderate Likelihood Possible Evidence D

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the simple version: Jamaican dogwood has natural calming, sedative-type effects. Ethosuximide (Zarontin) can already make some people feel drowsy or foggy. When you put the two together, those tired-out feelings may stack up, so you could feel more sleepy, dizzy, or slowed down than usual. This isn't about one changing how the other is broken down. It's just two things that both nudge your brain toward calm at the same time.

I'll be honest with you, this concern comes mostly from how these compounds behave in theory and in animal work, not from solid human studies. So it may not be a big deal for everyone, but I'd loop in your pharmacist or doctor before combining them, especially since seizure control matters and Jamaican dogwood can be harsh in larger amounts.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. Della, Loggia R., Tubaro, A., and Redaelli, C. [Evaluation of the activity on the mouse CNS of several plant extracts and a combination of them]. Riv.Neurol. 1981;51(5):297-310.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Jamaican Dogwood Also Interacts With Other Medications

Jamaican Dogwood has 247 moderate known drug interactions in our database — the Ethosuximide one above is one of them. If you take anything else, check it against the full list below.

Moderate 247 No known interaction 2,583 (incl. Ethosuximide)
Taking anything else?

Check Another of Your Medications Against Jamaican Dogwood

Covers the 2,830 medications we’ve checked against Jamaican Dogwood. Pick one to open its full report.

Everything else you take

See Every Supplement That Interacts With Ethosuximide

This page covers Jamaican Dogwood only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ethosuximide page lists 226 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Gamma-hydroxybutyrate (ghb) (major) and Grapefruit (major).

By severity: 9 major · 179 moderate · 38 minor.

From our pharmacist’s overview on the Ethosuximide page

“Ethosuximide (Zarontin) prevents absence seizures, and a steady blood level is what keeps them away, so I treat this list of 226 interacting supplements and herbs with real care, especially the nine rated major. More than half of the entries can change how the liver clears the drug; grapefruit can raise its level while St.”

Reviewed by 2 · Jul 18, 2026

Open the Ethosuximide interaction page

One more smart check

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

We hold 82 real supplement products containing Jamaican Dogwood, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Jamaican Dogwood. Your product may carry other ingredients that interact with Ethosuximide too, on top of Jamaican Dogwood — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Jamaican Dogwood and Ethosuximide 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 Jamaican Dogwood
Steady interest

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

29 days ago today
Medication Ethosuximide
Steady interest

#1,757 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.

Supplement

About Jamaican Dogwood

What is Jamaican Dogwood?

  • Insomnia and sleep trouble
  • Nerve pain
  • Anxiety and tension
  • Menstrual cramps
  • Muscle pain and spasms
  • Migraine and headaches

Jamaican dogwood is a tree bark traditionally used to promote sleep and ease pain, but high-quality human studies are lacking. It can be toxic in larger amounts and should be used cautiously, if at all, and never during pregnancy or breastfeeding. Talk to a pharmacist or doctor before trying it.

Read the full Jamaican Dogwood monograph & all interactions
Medication

About Ethosuximide

What Is Ethosuximide Used For?

Brand name: Zarontin

Ethosuximide — available as capsules and oral solution under the brand names Zarontin and Ethosuximide — is indicated for the control of absence (petit mal) epilepsy, a type of seizure disorder marked by brief lapses of consciousness.

It may also be used alongside other seizure medications when a patient has absence epilepsy together with other forms of epilepsy.

See full Ethosuximide drug information
Keep checking

Other Drugs & Jamaican Dogwood

Browse every other medication we’ve checked against Jamaican Dogwood — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
247Moderate
0Minor
2,582No known interaction
247 Moderate 2,582 No interaction
Moderate

247 interactions

Showing 60 of 247 moderate interactions — see all 247 on the Jamaican Dogwood page.

No interaction 2,582 drugs checked — show the list

We also checked Jamaican Dogwood against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,582 medications checked with no known interaction — see the full Jamaican Dogwood list.

See the full Jamaican Dogwood interactions page
See every supplement checked against Ethosuximide, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Jamaican Dogwood monograph › Uses, safety, and every drug interaction in one place Ethosuximide supplement interactions › Every supplement checked against Ethosuximide, ranked by severity Ethosuximide drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Jamaican Dogwood and Ethosuximide Together: Common Questions

Can you take Jamaican Dogwood with Ethosuximide?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Jamaican Dogwood and Ethosuximide interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Ethosuximide and Jamaican Dogwood?

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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.