Drug & supplement interaction

Ostarine + Eslicarbazepine Acetate

Eslicarbazepine Acetate brand name: Aptiom.

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

Ostarine has a moderate interaction with Eslicarbazepine Acetate. Theoretically, concomitant use of ostarine with CYP3A4 inducers could decrease the clinical effects of ostarine.

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

Ostarine and Eslicarbazepine Acetate

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

Moderate

CYTOCHROME P450 3A4 (CYP3A4) INDUCERS

Why this applies to Eslicarbazepine Acetate

Eslicarbazepine Acetate falls under CYTOCHROME P450 3A4 (CYP3A4) INDUCERS — the group Ostarine interacts with.

Theoretically, concomitant use of ostarine with CYP3A4 inducers could decrease the clinical effects of ostarine.
Ostarine is partially metabolized by CYP3A4. Clinical research shows that taking rifampin, a potent inducer of CYP3A4, reduces the maximum plasma concentration of ostarine by 23% and the area under the curve by 43%.
Severity Moderate Likelihood Possible Evidence B

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 key thing to understand about this pairing: the interaction runs toward Ostarine, not the other way around. Your seizure medication, eslicarbazepine (Aptiom), speeds up an enzyme in the liver called CYP3A4. Since Ostarine is partly broken down by that same enzyme, taking the two together would likely clear Ostarine out faster and weaken whatever effect it has. We saw something similar in a study with rifampin, a strong inducer, which lowered Ostarine levels noticeably.

I'll be straight with you, though: Ostarine is an unapproved experimental SARM that's been linked to liver injury and other serious harm, so I can't recommend using it at all. Aptiom itself shouldn't be affected here. Please talk with your pharmacist or doctor before mixing anything with your seizure medicine.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Coss CC, Jones A, Dalton JT. Pharmacokinetic drug interactions of the selective androgen receptor modulator GTx-024 (enobosarm) with itraconazole, rifampin, probenecid, celecoxib and rosuvastatin. Invest New Drugs 2016;34(4):458-67. PubMed

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

Ostarine Also Interacts With Other Medications

Ostarine has 439 moderate, 171 minor known drug interactions in our database — the Eslicarbazepine Acetate one above is one of them. If you take anything else, check it against the full list below.

Moderate 439 Minor 171 No known interaction 2,220 (incl. Eslicarbazepine Acetate)
Taking anything else?

Check Another of Your Medications Against Ostarine

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

Everything else you take

See Every Supplement That Interacts With Eslicarbazepine Acetate

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

The most serious there right now: Activated Charcoal (major), Alkanna (moderate), Alpine Ragwort (moderate), Boneset (moderate) and Borage (moderate).

By severity: 1 major · 27 moderate · 9 minor.

From our pharmacist’s overview on the Eslicarbazepine Acetate page

“Missing even part of a dose of Aptiom (eslicarbazepine acetate) can mean a breakthrough seizure, which is why I read this list with real care. Of the 37 supplement ingredients on file, only activated charcoal rates major; it binds the medicine in your gut and can sharply cut what reaches your blood.”

Reviewed by 2 · Jul 18, 2026

Open the Eslicarbazepine Acetate interaction page

One more smart check

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

We hold 33 real supplement products containing Ostarine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Ostarine. Your product may carry other ingredients that interact with Eslicarbazepine Acetate too, on top of Ostarine — 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 Ostarine and Eslicarbazepine Acetate 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 Ostarine
Top half

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

29 days ago today
Medication Eslicarbazepine Acetate
Steady interest

#2,080 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 Ostarine

What is Ostarine?

  • Muscle building
  • Athletic performance
  • Fat loss / body recomposition
  • Bodybuilding cycles

Ostarine (also called MK-2866 or enobosarm) is an experimental, unapproved drug known as a SARM (selective androgen receptor modulator), not a true dietary supplement. It is not approved by the FDA, is banned in sports, and has been linked to liver injury and other serious harms, so it is not recommended for general use.

Read the full Ostarine monograph & all interactions
Medication

About Eslicarbazepine

What Is Eslicarbazepine Used For?

Brand name: Aptiom

Eslicarbazepine acetate tablets — sold under the brand names Aptiom and Eslicarbazepine Acetate — are used to treat partial-onset seizures (seizures that start in one part of the brain) in patients 4 years of age and older. It can be used alone (monotherapy) or alongside other seizure medications (adjunctive therapy).

Both Aptiom and the generic eslicarbazepine acetate tablets are approved for this same use, in the same age range. The dose is adjusted based on age, body weight, and kidney function.

See full Eslicarbazepine drug information
Keep checking

Other Drugs & Ostarine

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

0Major
439Moderate
171Minor
2,219No known interaction
439 Moderate 171 Minor 2,219 No interaction
Moderate

439 interactions

Showing 60 of 439 moderate interactions — see all 439 on the Ostarine page.

Minor

171 interactions

Showing 60 of 171 minor interactions — see all 171 on the Ostarine page.

No interaction 2,219 drugs checked — show the list

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

Showing the 60 most looked-up of 2,219 medications checked with no known interaction — see the full Ostarine list.

See the full Ostarine interactions page
See every supplement checked against Eslicarbazepine Acetate, 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
Ostarine monograph › Uses, safety, and every drug interaction in one place Eslicarbazepine Acetate supplement interactions › Every supplement checked against Eslicarbazepine Acetate, ranked by severity Eslicarbazepine 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 Ostarine and Eslicarbazepine Acetate Together: Common Questions

Can you take Ostarine with Eslicarbazepine Acetate?
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 Ostarine and Eslicarbazepine Acetate 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 Eslicarbazepine Acetate and Ostarine?

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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.