Drug & supplement interaction

Coriander + Brompheniramine, Dextromethorphan, Phenylephrine

Brompheniramine, Dextromethorphan, Phenylephrine brand name: Dimetapp DM.

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

Coriander has a moderate interaction with Brompheniramine, Dextromethorphan, Phenylephrine. Theoretically, coriander might increase the risk of photosensitivity when taken with photosensitizing drugs.

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

Coriander and Brompheniramine, Dextromethorphan, Phenylephrine

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

Moderate

PHOTOSENSITIZING DRUGS

Why this applies to Brompheniramine, Dextromethorphan, Phenylephrine

Brompheniramine, Dextromethorphan, Phenylephrine falls under PHOTOSENSITIZING DRUGS — the group Coriander interacts with.

Theoretically, coriander might increase the risk of photosensitivity when taken with photosensitizing drugs.
Evidence from in vitro research suggests that coriandrin, a constituent of coriander, has photosensitizing 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

Here's the gist with this combo cold-and-cough product (Dimetapp DM). The concern on file isn't about how your body breaks down these medicines. It's about your skin. Coriander contains a compound called coriandrin, which in lab studies showed the potential to make skin more sensitive to sunlight. The thinking is that pairing it with a drug that can also cause photosensitivity might add up to a slightly higher chance of sunburn or a rash with sun exposure.

I'll be honest, this is theoretical and based on weak, anecdotal and lab-only evidence. Normal amounts of coriander in your cooking are very unlikely to cause any trouble. If you're using concentrated coriander extracts or oils and notice your skin burning easily, use sunscreen and check in with your pharmacist or doctor.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Ashwood-Smith, M. J., Warrington, P. J., Jenkins, M., Ceska, O., and Romaniuk, P. J. Photobiological properties of a novel, naturally occurring furoisocoumarin, coriandrin. Photochem.Photobiol. 1989;50(6):745-751. 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

Coriander Also Interacts With Other Medications

Coriander has 716 moderate known drug interactions in our database — the Brompheniramine, Dextromethorphan, Phenylephrine one above is one of them. If you take anything else, check it against the full list below.

Moderate 716 No known interaction 2,114 (incl. Brompheniramine, Dextromethorphan, Phenylephrine)
Taking anything else?

Check Another of Your Medications Against Coriander

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

Everything else you take

See Every Supplement That Interacts With Brompheniramine, Dextromethorphan, Phenylephrine

This page covers Coriander only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Brompheniramine, Dextromethorphan, Phenylephrine page lists 149 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Grapefruit (major), Lithium (major) and Peyote (major).

By severity: 7 major · 120 moderate · 22 minor.

From our pharmacist’s overview on the Brompheniramine, Dextromethorphan, Phenylephrine page

“Dimetapp DM, the cold medicine combining brompheniramine, dextromethorphan, and phenylephrine, earns more caution than its over-the-counter status suggests. Seven of the 149 supplement ingredients on this page carry a major rating, and most of those stack stimulant effects on top of phenylephrine, pushing blood pressure and heart strai…”

Reviewed by 2 · Jul 18, 2026

Open the Brompheniramine, Dextromethorphan, Phenylephrine interaction page

One more smart check

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

We hold 934 real supplement products containing Coriander, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Coriander. Your product may carry other ingredients that interact with Brompheniramine, Dextromethorphan, Phenylephrine too, on top of Coriander — 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 Coriander and Brompheniramine, Dextromethorphan, Phenylephrine 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 Coriander
Top 25%

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

29 days ago today
Medication Brompheniramine, Dextromethorphan, Phenylephrine
Top 25%

#476 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 Coriander

What is Coriander?

Coriander
  • Digestive upset and gas
  • Appetite stimulation
  • Mild antimicrobial (topical)
  • Diarrhea and IBS symptoms
  • General flavoring and traditional remedy

Coriander (also called cilantro) is a common cooking herb and spice that has long been used in traditional medicine for digestive complaints. As a food it is generally safe for most people, but high-quality human studies supporting its medicinal benefits are limited. Talk with your pharmacist or doctor before using concentrated extracts or essential oils.

Read the full Coriander monograph & all interactions
Keep checking

Other Drugs & Coriander

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

0Major
716Moderate
0Minor
2,113No known interaction
716 Moderate 2,113 No interaction
Moderate

716 interactions

Showing 60 of 716 moderate interactions — see all 716 on the Coriander page.

No interaction 2,113 drugs checked — show the list

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

Showing the 60 most looked-up of 2,113 medications checked with no known interaction — see the full Coriander list.

See the full Coriander interactions page
See every supplement checked against Brompheniramine, Dextromethorphan, Phenylephrine, 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
Coriander monograph › Uses, safety, and every drug interaction in one place Brompheniramine, Dextromethorphan, Phenylephrine supplement interactions › Every supplement checked against Brompheniramine, Dextromethorphan, Phenylephrine, 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 Coriander and Brompheniramine, Dextromethorphan, Phenylephrine Together: Common Questions

Can you take Coriander with Brompheniramine, Dextromethorphan, Phenylephrine?
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 Coriander and Brompheniramine, Dextromethorphan, Phenylephrine 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 Brompheniramine, Dextromethorphan, Phenylephrine and Coriander?

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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.