Medication interaction hub

What Supplements Interact with Nirmatrelvir, Ritonavir?

Nirmatrelvir, Ritonavir brand name: Paxlovid. Every interaction below applies to the brands too.

176 Interactions 6 Major 134 Moderate 36 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Nirmatrelvir, Ritonavir? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Nirmatrelvir, Ritonavir against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Paxlovid (nirmatrelvir and ritonavir) deserves genuine care around supplements, mostly because its ritonavir component strongly blocks the liver enzyme CYP3A4. The bulk of this list is made up of ingredients that enzyme normally clears, so their levels can climb unpredictably during the five-day course. St. John's wort does the opposite, revving the enzyme up and potentially draining the antiviral itself, which makes it the single most important entry here. Grapefruit deepens the blockade, and heavy alcohol earns a major rating for added strain on the liver.

A smaller cluster acts in the gut, where activated charcoal and bulky fiber supplements can blunt the pills' absorption, so keep those well apart from each dose. Six of the 176 ingredients on file rate major, alongside 134 moderate and 36 minor. Since the course is so short, pausing most supplements until it ends is often the cleanest move, and your pharmacist can flag the few that truly matter.

— , Clinical Pharmacist · July 18, 2026

Major 6 Moderate 134 Minor 36 No known interaction 1,276

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Nirmatrelvir, Ritonavir: Top Interactions at a Glance

The most significant Nirmatrelvir, Ritonavir supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 176 interacting ingredients — plus 1,276 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Nirmatrelvir, Ritonavir + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Likely Grapefruit + Nirmatrelvir, Ritonaviri

Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Read the full interaction Major Likelihood Likely Siberian Cocklebur + Nirmatrelvir, Ritonaviri

Siberian cocklebur can adversely affect the liver.

Read the full interaction Major Likelihood Probable Activated Charcoal + Nirmatrelvir, Ritonaviri

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable Beer + Nirmatrelvir, Ritonaviri

Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Read the full interaction Major Likelihood Probable St. John's Wort + Nirmatrelvir, Ritonaviri

St.

Read the full interaction Major Likelihood Probable Wine + Nirmatrelvir, Ritonaviri

Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Read the full interaction
The complete list

Every Supplement Checked Against Nirmatrelvir, Ritonavir

All 1,452 ingredients in our database, ranked by severity — 176 with a Nirmatrelvir, Ritonavir interaction on file and 1,276 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Nirmatrelvir, Ritonavir?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Echinacea with Nirmatrelvir, Ritonavir?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Echinacea may induce hepatic CYP3A4 and inhibit intestinal CYP3A4.

Full Echinacea + Nirmatrelvir, Ritonavir answer

Can you take Lentinan with Nirmatrelvir, Ritonavir?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Laboratory research suggests that lentinan might increase the activity of cytochrome P450 3A4 (CYP3A4).

Full Lentinan + Nirmatrelvir, Ritonavir answer

Can you take Karaya Gum with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Co-administration of oral drugs with bulk forming laxatives such as karaya gum may decrease, increase, or have no effect on the absorption o...

Full Karaya Gum + Nirmatrelvir, Ritonavir answer

Can you take Eleuthero with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, eleuthero might increase levels of drugs metabolized by CYP3A4.

Full Eleuthero + Nirmatrelvir, Ritonavir answer

Can you take Gymnema with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, gymnema might increase levels of drugs metabolized by CYP3A4.

Full Gymnema + Nirmatrelvir, Ritonavir answer

Can you take Humann Superbeets Heart Chews with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Each serving of HumanN SuperBeets includes 150mg of grape seed extract (2 chews).

Full Humann Superbeets Heart Chews + Nirmatrelvir, Ritonavir answer

Can you take Jequirity with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. In vitro research shows that jequirity extract inhibits CYP3A4 enzymes.

Full Jequirity + Nirmatrelvir, Ritonavir answer

Can you take Milk Thistle with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. It is unclear if milk thistle inhibits CYP3A4; research is conflicting.

Full Milk Thistle + Nirmatrelvir, Ritonavir answer

Can you take Mommy's Bliss Gripe Water with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Mommy's Bliss Gripe Water contains fennel seed.

Full Mommy's Bliss Gripe Water + Nirmatrelvir, Ritonavir answer

Can you take Polypodium Leucotomos with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, Polypodium leucotomos might increase levels of drugs metabolized by CYP3A4.

Full Polypodium Leucotomos + Nirmatrelvir, Ritonavir answer

Can you take Pomegranate with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, pomegranate might increase levels of drugs metabolized by CYP3A4, but most research suggests this interaction is unlikely to...

Full Pomegranate + Nirmatrelvir, Ritonavir answer

Can you take Red Clover with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.

Full Red Clover + Nirmatrelvir, Ritonavir answer

Can you take Tangerine with Nirmatrelvir, Ritonavir?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. In vitro, tangeretin, a constituent of tangerine, induces a 52% increase in the metabolism of midazolam by cytochrome P450 3A4 (CYP3A4).

Full Tangerine + Nirmatrelvir, Ritonavir answer

Can you take Grapefruit with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Full Grapefruit + Nirmatrelvir, Ritonavir answer

Can you take Siberian Cocklebur with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Siberian cocklebur can adversely affect the liver.

Full Siberian Cocklebur + Nirmatrelvir, Ritonavir answer

Can you take Activated Charcoal with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Nirmatrelvir, Ritonavir answer

Can you take Beer with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Full Beer + Nirmatrelvir, Ritonavir answer

Can you take St. John's Wort with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. St.

Full St. John's Wort + Nirmatrelvir, Ritonavir answer

Can you take Wine with Nirmatrelvir, Ritonavir?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Full Wine + Nirmatrelvir, Ritonavir answer

Can you take Cannabidiol (cbd) with Nirmatrelvir, Ritonavir?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Cannabidiol may increase levels of drugs that are metabolized by CYP3A4.

Full Cannabidiol (cbd) + Nirmatrelvir, Ritonavir answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction 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.
  • Possible. 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
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Nirmatrelvir, Ritonavir is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Nirmatrelvir, Ritonavir, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Nirmatrelvir, Ritonavir sits in 7 interaction categories. Open any one to see what the group means:

Cytochrome P450 3A4 (Cyp3A4) Substrates 121 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

121 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Hepatotoxic Drugs 38 ingredients

Medications with known liver considerations. Supplements that can stress the liver add to the load.

38 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Cytochrome P450 3A4 (Cyp3A4) Inhibitors 13 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

13 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Ritonavir (Norvir) 4 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

4 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Lopinavir/Ritonavir (Kaletra) 3 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

3 of the supplement ingredients on this page reach Nirmatrelvir, Ritonavir through this category.

Nirmatrelvir/Ritonavir (Paxlovid) 1 ingredient

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

1 of the supplement ingredient on this page reaches Nirmatrelvir, Ritonavir through this category.

About Nirmatrelvir, Ritonavir

Nirmatrelvir and ritonavir (Paxlovid) is an antiviral combination used to treat mild-to-moderate COVID-19 in adults who are at high risk of becoming seriously ill.

Generic name: Nirmatrelvir, Ritonavir  ·  Brand name: Paxlovid.

See the full Nirmatrelvir and Ritonavir drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Nirmatrelvir, Ritonavir

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Nirmatrelvir, Ritonavir.

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Pharmacist Counseling Corner

Nirmatrelvir, Ritonavir & Supplements: Common Questions

What supplements interact with Nirmatrelvir, Ritonavir?
Our database currently documents 176 ingredients with a known Nirmatrelvir, Ritonavir interaction (6 major, 134 moderate, 36 minor). The practical move: scan the major group first, then look up the exact supplements you take rather than reading all 176. The highest-ranked right now: Grapefruit, Siberian Cocklebur, Activated Charcoal.
Which Nirmatrelvir, Ritonavir supplement interactions are the most serious?
Focus on the major group: Grapefruit, Siberian Cocklebur, Activated Charcoal, Beer and St. John's Wort, among others. A major rating means the combination can be clinically significant, not that harm is guaranteed — but it's exactly the kind of thing to run past your pharmacist before your next dose, not after. Jump to the ranked list.
Can I take vitamins or supplements while on Nirmatrelvir, Ritonavir?
Plenty of supplements coexist fine with Nirmatrelvir, Ritonavir; a shorter list does not. Rather than memorizing it, check the specific ingredients on your labels — the ranked list above covers every one we've checked, and multi-ingredient products can be checked label-by-label with our scanner. Try the label scanner or the interaction checker.
Do brands like Paxlovid have the same supplement interactions as Nirmatrelvir, Ritonavir?
Yes — Paxlovid all contain Nirmatrelvir, Ritonavir, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Nirmatrelvir, Ritonavir and my other medications?
This page covers Nirmatrelvir, Ritonavir against supplements and herbal ingredients. Checking Nirmatrelvir, Ritonavir against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Nirmatrelvir and Ritonavir drug information.

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

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 22, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.