Drug & supplement interaction

Comfrey + Mipomersen Sodium

Mipomersen Sodium brand name: Kynamro.

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

Comfrey has a moderate interaction with Mipomersen Sodium. Theoretically, comfrey might have additive adverse effects on the liver when used with hepatotoxic drugs.

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

Comfrey and Mipomersen Sodium

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

Moderate

HEPATOTOXIC DRUGS

Why this applies to Mipomersen Sodium

Mipomersen Sodium falls under HEPATOTOXIC DRUGS — the group Comfrey interacts with.

Theoretically, comfrey might have additive adverse effects on the liver when used with hepatotoxic drugs.
Due to its pyrrolizidine alkaloid constituents, comfrey can cause hepatotoxic effects, including ascites, cirrhosis, hepatic fibrosis, hepatomegaly, and sinusoidal obstruction syndrome.
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 concern with these two together: mipomersen (Kynamro) is already known to be hard on the liver. It can raise liver enzymes and cause fat to build up in the liver, which is why people on it get regular blood tests to check liver function. Comfrey, when taken by mouth, contains pyrrolizidine alkaloids that can also injure the liver. Stacking two liver stressors could, in theory, add up and increase the risk of liver problems.

To be fair, this is a theoretical caution based on how each one behaves, not on real cases of people combining them. Still, oral comfrey shouldn't be taken at all, and that goes double if you're on mipomersen. Topical comfrey on intact skin for short periods is far less worrisome, but please run any comfrey use past your doctor or pharmacist first.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Food and Drug Administration. FDA Advises Dietary Supplement Manufacturers to Remove Comfrey Products From the Market. July 6, 2001. Available at: http://www.cfsan.fda.gov/~dms/dspltr06.html.
  2. Stickel F, Seitz HK. The efficacy and safety of comfrey. Public Health Nutr 2000;3:501-8. 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

Comfrey Also Interacts With Other Medications

Comfrey has 437 moderate known drug interactions in our database — the Mipomersen Sodium one above is one of them. If you take anything else, check it against the full list below.

Moderate 437 No known interaction 2,393 (incl. Mipomersen Sodium)
Taking anything else?

Check Another of Your Medications Against Comfrey

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

Everything else you take

See Every Supplement That Interacts With Mipomersen Sodium

This page covers Comfrey only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Mipomersen Sodium page lists 38 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Beer (major), Siberian Cocklebur (major), Wine (major), Ashwagandha (moderate) and Black Cohosh (moderate).

By severity: 3 major · 35 moderate.

From our pharmacist’s overview on the Mipomersen Sodium page

“Kynamro (mipomersen sodium) treats a severe inherited cholesterol disorder, and it already carries a serious warning about liver injury on its own. All 38 supplements and herbs on this page interact the same way, by adding their own liver stress to a medicine that is hard on that organ to begin with, so approach this list with genuine…”

Reviewed by 2 · Jul 18, 2026

Open the Mipomersen Sodium interaction page

One more smart check

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

We hold 29 real supplement products containing Comfrey, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Comfrey. Your product may carry other ingredients that interact with Mipomersen Sodium too, on top of Comfrey — 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 Comfrey and Mipomersen Sodium 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 Comfrey
Steady interest

#1,143 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Mipomersen Sodium
Steady interest

#2,256 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 Comfrey

What is Comfrey?

Comfrey
  • Bruises and sprains
  • Muscle and joint pain
  • Minor wounds and skin irritation
  • Back pain
  • Inflammation

Comfrey is a traditional herb used mainly on the skin for bruises, sprains, and joint pain, and some topical products show modest benefit for these uses. However, comfrey contains compounds that can seriously damage the liver, so it should never be taken by mouth and should only be used on unbroken skin for short periods. Pregnant or breastfeeding people should avoid it entirely.

Read the full Comfrey monograph & all interactions
Medication

About Mipomersen Injection

What Is Mipomersen Injection Used For?

Brand name: Kynamro

  • Mipomersen injection is used to decrease levels of cholesterol and other fatty substances in the blood in people who have homozygous familial hypercholesterolemia (HoFH; a rare inherited condition that causes very high levels of cholesterol in the blood, increasing the risk of serious heart disease). Some people with HoFH may be treated with LDL apheresis (a procedure that removes LDL from the blood), but mipomersen injection should not be used along with this treatment. Mipomersen injection should not be used to decrease cholesterol levels in people who do not have HoFH. Mipomersen injection is in a class of medications called antisense oligonucleotide (ASO) inhibitors. It works by preventing certain fatty substances from forming in the body.

See full Mipomersen Injection drug information
Keep checking

Other Drugs & Comfrey

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

0Major
437Moderate
0Minor
2,392No known interaction
437 Moderate 2,392 No interaction
Moderate

437 interactions

Showing 60 of 437 moderate interactions — see all 437 on the Comfrey page.

No interaction 2,392 drugs checked — show the list

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

Showing the 60 most looked-up of 2,392 medications checked with no known interaction — see the full Comfrey list.

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

Can you take Comfrey with Mipomersen Sodium?
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 Comfrey and Mipomersen Sodium 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 Mipomersen Sodium and Comfrey?

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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.