Drug & supplement interaction

Berberine + Amitriptyline, Chlordiazepoxide

Amitriptyline, Chlordiazepoxide brand name: Limbitrol DS.

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

Amitriptyline, Chlordiazepoxide falls into 4 drug categories that Berberine can interact with; the most serious is rated moderate. Theoretically, berberine might increase the sedative effects of CNS depressants.

Read the full interaction report
SeverityModerate
LikelihoodPossible
Interactions4
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Berberine and Amitriptyline, Chlordiazepoxide

These two interact in 4 distinct ways. Each one is explained separately below.

Why Are There 4 Interactions?

Berberine interacts with whole categories of medication. Amitriptyline, Chlordiazepoxide falls into 4 of those categories, so it can interact with Berberine in 4 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).

Moderate

CNS DEPRESSANTS

1 of 4

Why this applies to Amitriptyline, Chlordiazepoxide

Amitriptyline, Chlordiazepoxide falls under CNS DEPRESSANTS — the group Berberine interacts with.

Theoretically, berberine might increase the sedative effects of CNS depressants.
Animal research suggests that berberine may have sedative effects. Theoretically, use of berberine along with CNS depressants might produce additive therapeutic and adverse 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

Limbitrol combines two medicines that can already make you drowsy: amitriptyline (a tricyclic antidepressant) and chlordiazepoxide (a benzodiazepine, related to Librium). Both calm the nervous system, so this pill can leave you feeling sleepy, foggy, or unsteady on its own.

The concern here is simply additive. In animal studies, berberine appeared to have its own mild sedating effect, so pairing it with Limbitrol could, in theory, deepen the drowsiness, dizziness, or slowed thinking you might notice. To be clear, this is only laboratory and animal evidence, not proven in people, so I wouldn't panic. Still, since both drugs in Limbitrol are sedating, it's worth a quick chat with your pharmacist or doctor before adding berberine, especially if you're already feeling groggy.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Janbaz KH, Gilani AH. Studies on preventive and curative effects of berberine on chemical-induced hepatotoxicity in rodents. Fitoterapia 2000;71:25-33.. PubMed
  2. Shanbhag, S. M., Kulkarni, H. J., and Gaitonde, B. B. Pharmacological actions of berberine on the central nervous system. Jpn.J Pharmacol 1970;20(4):482-487. PubMed
  3. Peng, W. H., Hsieh, M. T., and Wu, C. R. Effect of long-term administration of berberine on scopolamine-induced amnesia in rats. Jpn J Pharmacol 1997;74(3):261-266. DOI
  4. Sabir M and Bhide NK. Study of some pharmacological actions of berberine. Ind J Physiol & Pharmac 1971;15(3):111-132.
Moderate

CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES

2 of 4

Amitriptyline, Chlordiazepoxide also falls under CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES.

Theoretically, berberine might increase serum levels of drugs metabolized by CYP2D6.
In vitro research and preliminary clinical evidence show that berberine can inhibit CYP2D6. Theoretically, use of berberine with drugs metabolized by CYP2D6 might increase drug levels and increase the risk of adverse effects.
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

Limbitrol DS combines amitriptyline (an older antidepressant) with chlordiazepoxide (a benzodiazepine for anxiety). The amitriptyline part leans on a liver enzyme called CYP2D6 to be broken down and cleared. Berberine appears to slow that same enzyme down, so in theory the amitriptyline could build up a bit more than expected.

If that happens, you might notice more of amitriptyline's usual effects, like drowsiness, dry mouth, constipation, blurred vision, dizziness on standing, or a faster heartbeat. Right now this is mostly theoretical and based on lab work plus a little early human data, so it is not a sure thing. Still, since amitriptyline can be touchy at higher levels, please run berberine past your pharmacist or doctor before starting it.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Chatterjee P, Franklin MR. Human cytochrome p450 inhibition and metabolic-intermediate complex formation by goldenseal extract and its methylenedioxyphenyl components. Drug Metab Dispos 2003;31:1391-7. PubMed
  2. Guo, Y., Chen, Y., Tan, Z. R., Klaassen, C. D., and Zhou, H. H. Repeated administration of berberine inhibits cytochromes P450 in humans. Eur J Clin Pharmacol 2012;68(2):213-217. PubMed
  3. Hermann, R. and von, Richter O. Clinical evidence of herbal drugs as perpetrators of pharmacokinetic drug interactions. Planta Med 2012;78(13):1458-1477. PubMed
Moderate

CYTOCHROME P450 2C9 (CYP2C9) SUBSTRATES

3 of 4

Amitriptyline, Chlordiazepoxide also falls under CYTOCHROME P450 2C9 (CYP2C9) SUBSTRATES.

Theoretically, berberine might increase serum levels of drugs metabolized by CYP2C9.
Preliminary clinical research shows that berberine can inhibit CYP2C9. Theoretically, taking berberine with drugs metabolized by CYP2C9 might increase drug levels and increase the risk of adverse effects.
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 gist with Limbitrol, which pairs amitriptyline (an older antidepressant) with chlordiazepoxide (a benzodiazepine). Berberine appears to slow down a liver enzyme called CYP2C9, and that's one of the pathways your body uses to clear these medicines. If that pathway gets blocked, the drug can hang around a little longer than usual.

In plain terms, the levels could nudge upward, which might mean more drowsiness, dizziness, dry mouth, constipation, or grogginess than you're used to. I want to be honest though: this is mostly theoretical and based on early, lower-quality research, so it may not amount to much for everyone. Still, both of these medicines already cause sedation, so please run berberine past your pharmacist or doctor before adding it.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Guo, Y., Chen, Y., Tan, Z. R., Klaassen, C. D., and Zhou, H. H. Repeated administration of berberine inhibits cytochromes P450 in humans. Eur J Clin Pharmacol 2012;68(2):213-217. PubMed
Moderate

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

4 of 4

Amitriptyline, Chlordiazepoxide also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.

Theoretically, berberine might increase serum levels of drugs metabolized by CYP3A4.
In vitro research and preliminary clinical research show that berberine moderately inhibits CYP3A4. Theoretically, use of berberine with drugs metabolized by CYP3A4 might increase drug levels and increase the risk of adverse effects.
Severity Moderate Likelihood Possible Evidence A

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

Limbitrol DS combines amitriptyline (an antidepressant) with chlordiazepoxide (a benzodiazepine for anxiety). Both rely partly on the liver enzyme CYP3A4 to be cleared from your body. Berberine appears to slow that enzyme down a bit, so in theory it could let these medicines build up higher than usual.

If that happens, you might notice stronger sedative effects: more drowsiness, dizziness, dry mouth, constipation, blurred vision, or feeling foggy. Right now this concern is mostly theoretical and the effect looks modest, so don't panic. Still, since both drugs already cause sedation, it's worth a quick chat with your pharmacist or doctor before adding berberine, and watch for extra grogginess if you do.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Wu X, Li Q, Xin H, Yu A, Zhong M. Effects of berberine on the blood concentration of cyclosporin A in renal transplanted recipients: clinical and pharmacokinetic study. Eur J Clin Pharmacol 2005;61:567-72. PubMed
  2. Budzinski JW, Foster BC, Vandenhoek S, Arnason JT. An in vitro evaluation of human cytochrome P450 3A4 inhibition by selected commercial herbal extracts and tinctures. Phytomedicine 2000;7:273-82. PubMed
  3. Guo, Y., Chen, Y., Tan, Z. R., Klaassen, C. D., and Zhou, H. H. Repeated administration of berberine inhibits cytochromes P450 in humans. Eur J Clin Pharmacol 2012;68(2):213-217. PubMed
  4. Hermann, R. and von, Richter O. Clinical evidence of herbal drugs as perpetrators of pharmacokinetic drug interactions. Planta Med 2012;78(13):1458-1477. 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

Berberine Also Interacts With Other Medications

Berberine has 1 major, 1,158 moderate known drug interactions in our database — the Amitriptyline, Chlordiazepoxide one above is among them. If you take anything else, check it against the full list below.

Major 1 Moderate 1,158 No known interaction 1,671 (incl. Amitriptyline, Chlordiazepoxide)
Taking anything else?

Check Another of Your Medications Against Berberine

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

From our Q&A

Questions About Berberine or Amitriptyline, Chlordiazepoxide

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Berberine or Amitriptyline, Chlordiazepoxide, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Amitriptyline, Chlordiazepoxide

This page covers Berberine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Amitriptyline, Chlordiazepoxide page lists 298 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), American Hellebore (major), Arsenic (major) and Beer (major).

By severity: 17 major · 231 moderate · 50 minor.

From our pharmacist’s overview on the Amitriptyline, Chlordiazepoxide page

“Alcohol is the first thing to know about here. Beer and wine both carry major, well-documented interactions with Amitriptyline and Chlordiazepoxide (Limbitrol DS), because both drugs already slow the central nervous system, and anything sedating layered on top can deepen ordinary drowsiness into something dangerous.”

Reviewed by 2 · Jul 18, 2026

Open the Amitriptyline, Chlordiazepoxide interaction page

One more smart check

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

We hold 908 real supplement products containing Berberine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Berberine. Your product may carry other ingredients that interact with Amitriptyline, Chlordiazepoxide too, on top of Berberine — 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 Berberine and Amitriptyline, Chlordiazepoxide 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 Berberine
Top 10%

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

29 days ago today
Medication Amitriptyline, Chlordiazepoxide
Steady interest

#1,755 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 Berberine

What is Berberine?

Berberine
  • Blood sugar control
  • High cholesterol
  • Heart and metabolic health
  • Digestive upset
  • Antimicrobial support
  • Weight management

Berberine is a yellow plant compound that has shown promise for lowering blood sugar and cholesterol in some studies, but the quality of research varies and it is not a replacement for prescribed medicine. It can cause stomach upset and should be avoided during pregnancy and breastfeeding. Always check with your pharmacist or doctor before starting it, especially if you take other medications.

Read the full Berberine monograph & all interactions
Keep checking

Other Drugs & Berberine

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

1Major
1,158Moderate
0Minor
1,670No known interaction
1 Major 1,158 Moderate 1,670 No interaction
Major

1 interaction

Moderate

1,158 interactions

Showing 60 of 1,158 moderate interactions — see all 1,158 on the Berberine page.

No interaction 1,670 drugs checked — show the list

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

Showing the 60 most looked-up of 1,670 medications checked with no known interaction — see the full Berberine list.

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

Can you take Berberine with Amitriptyline, Chlordiazepoxide?
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.
Why are there 4 interactions listed for Berberine and Amitriptyline, Chlordiazepoxide?
Amitriptyline, Chlordiazepoxide belongs to more than one drug category, and Berberine interacts with each of those categories a little differently. We list every one so nothing is missed — your overall risk is driven by the most serious of them.
How serious is the Berberine and Amitriptyline, Chlordiazepoxide 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 Amitriptyline, Chlordiazepoxide and Berberine?

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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.