Drug & supplement interaction

Nutmeg + Sofosbuvir, Velpatasvir, Voxilaprevir

Sofosbuvir, Velpatasvir, Voxilaprevir brand name: Vosevi.

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

Nutmeg has a moderate interaction with Sofosbuvir, Velpatasvir, Voxilaprevir. Theoretically, nutmeg might decrease levels of drugs metabolized by CYP1A2.

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

Nutmeg and Sofosbuvir, Velpatasvir, Voxilaprevir

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

Moderate

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES

Why this applies to Sofosbuvir, Velpatasvir, Voxilaprevir

Sofosbuvir, Velpatasvir, Voxilaprevir falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES — the group Nutmeg interacts with.

Theoretically, nutmeg might decrease levels of drugs metabolized by CYP1A2.
Animal research suggests that intraperitoneal injections of myristicin, a constituent of nutmeg, can induce CYP1A2.
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 honest picture with Vosevi (sofosbuvir, velpatasvir, and voxilaprevir) and nutmeg. The concern on file is that a compound in nutmeg called myristicin might speed up a liver enzyme known as CYP1A2. If a drug is cleared faster, your body could end up with lower levels of it. For a hepatitis C treatment, lower levels theoretically mean less virus-fighting power, which matters because finishing the full course at full strength is what clears the infection.

That said, this is very weak evidence. It comes only from animal studies using injected myristicin, not from people taking nutmeg by mouth, and Vosevi isn't mainly handled by CYP1A2 anyway. Normal cooking amounts of nutmeg are very unlikely to cause any problem. Just avoid large medicinal doses, and check with your pharmacist or doctor to be safe.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Jeong HG, Yun CH. Induction of rat hepatic cytochrome P450 enzymes by myristicin. Biochem Biophys Res Commun 1995;217:966-71. 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

Nutmeg Also Interacts With Other Medications

Nutmeg has 527 moderate known drug interactions in our database — the Sofosbuvir, Velpatasvir, Voxilaprevir one above is one of them. If you take anything else, check it against the full list below.

Moderate 527 No known interaction 2,303 (incl. Sofosbuvir, Velpatasvir, Voxilaprevir)
Taking anything else?

Check Another of Your Medications Against Nutmeg

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

Everything else you take

See Every Supplement That Interacts With Sofosbuvir, Velpatasvir, Voxilaprevir

This page covers Nutmeg only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sofosbuvir, Velpatasvir, Voxilaprevir page lists 173 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 130 moderate · 40 minor.

From our pharmacist’s overview on the Sofosbuvir, Velpatasvir, Voxilaprevir page

“Vosevi (sofosbuvir, velpatasvir, and voxilaprevir) cures hepatitis C over a single short course, and that is exactly why I would be genuinely careful with supplements while taking it. Anything that drags its blood levels down can cost you the cure itself.”

Reviewed by 2 · Jul 18, 2026

Open the Sofosbuvir, Velpatasvir, Voxilaprevir interaction page

One more smart check

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

We hold 182 real supplement products containing Nutmeg, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Nutmeg. Your product may carry other ingredients that interact with Sofosbuvir, Velpatasvir, Voxilaprevir too, on top of Nutmeg — 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 Nutmeg and Sofosbuvir, Velpatasvir, Voxilaprevir 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 Nutmeg
Top half

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

29 days ago today
Medication Sofosbuvir, Velpatasvir, Voxilaprevir
Top 25%

#628 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 Nutmeg

What is Nutmeg?

Nutmeg
  • Digestive upset
  • Diarrhea
  • Sleep and relaxation
  • Pain and inflammation
  • Flavoring spice

Nutmeg is a popular cooking spice that has long been used in traditional medicine for digestion and other complaints, but there is little solid human research to support its medicinal use. In normal cooking amounts it is generally safe, but larger "medicinal" doses can cause serious poisoning, so it should never be taken in high amounts.

Read the full Nutmeg monograph & all interactions
Medication

About Sofosbuvir, Velpatasvir, and Voxilaprevir

What Is Sofosbuvir, Velpatasvir, and Voxilaprevir Used For?

Brand name: Vosevi

Vosevi is used to treat chronic hepatitis C virus (HCV) infection in adults who do not have cirrhosis or who have compensated cirrhosis (mild liver scarring that is still functioning). It is specifically for people who have already been treated with an HCV regimen before and need a different option.

Vosevi is approved for adults with HCV genotype 1, 2, 3, 4, 5, or 6 who previously took a medicine that included an NS5A inhibitor. It is also approved for adults with genotype 1a or 3 who previously took sofosbuvir without an NS5A inhibitor.

See full Sofosbuvir, Velpatasvir, and Voxilaprevir drug information
Keep checking

Other Drugs & Nutmeg

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

0Major
527Moderate
0Minor
2,302No known interaction
527 Moderate 2,302 No interaction
Moderate

527 interactions

Showing 60 of 527 moderate interactions — see all 527 on the Nutmeg page.

No interaction 2,302 drugs checked — show the list

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

Showing the 60 most looked-up of 2,302 medications checked with no known interaction — see the full Nutmeg list.

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

Can you take Nutmeg with Sofosbuvir, Velpatasvir, Voxilaprevir?
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 Nutmeg and Sofosbuvir, Velpatasvir, Voxilaprevir 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 Sofosbuvir, Velpatasvir, Voxilaprevir and Nutmeg?

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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.