Drug & supplement interaction

Green Coffee + Brompheniramine, Phenylephrine, Phenylpropanolamine

Brompheniramine, Phenylephrine, Phenylpropanolamine brand names: Normatane TD, Dime Time.

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

Brompheniramine, Phenylephrine, Phenylpropanolamine falls into 2 drug categories that Green Coffee can interact with; the most serious is rated moderate. Theoretically, concomitant use might increase stimulant adverse effects.

Read the full interaction report
SeverityModerate
LikelihoodProbable
Interactions2
EvidenceC
What do Severity, Likelihood & Evidence mean?
Know someone taking this? Share
Facebook Post Reddit Email
On this page
Interaction report

Green Coffee and Brompheniramine, Phenylephrine, Phenylpropanolamine

These two interact in 2 distinct ways. Each one is explained separately below.

Why Are There 2 Interactions?

Green Coffee interacts with whole categories of medication. Brompheniramine, Phenylephrine, Phenylpropanolamine falls into 2 of those categories, so it can interact with Green Coffee in 2 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).

Moderate

STIMULANT DRUGS

1 of 2

Why this applies to Brompheniramine, Phenylephrine, Phenylpropanolamine

Brompheniramine, Phenylephrine, Phenylpropanolamine falls under STIMULANT DRUGS — the group Green Coffee interacts with.

Theoretically, concomitant use might increase stimulant adverse effects.
Green coffee can contain caffeine. Due to the central nervous system (CNS) stimulant effects of caffeine, concomitant use with stimulant drugs can increase the risk of adverse effects.
Severity Moderate Likelihood Probable Evidence C

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..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the simple version: this combo product contains phenylephrine and phenylpropanolamine, which are decongestants that act like mild stimulants on your body. Green coffee adds caffeine to the mix. Stacking two stimulant-type ingredients can pile on the same side effects, so you might notice a faster or pounding heartbeat, jitteriness, anxiousness, trouble sleeping, or a bump in blood pressure.

This is mostly a theoretical concern based on expert opinion, not strong studies, so it's not a reason to panic. A regular cup of coffee usually won't do much, but concentrated green coffee supplements give a bigger caffeine punch. If you have high blood pressure or heart issues, check with your pharmacist or doctor before combining them.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Institute of Medicine. Caffeine for the Sustainment of Mental Task Performance: Formulations for Military Operations. Washington, DC: National Academy Press, 2001. Available at: http://books.nap.edu/books/0309082587/html/index.html. DOI
Moderate

PHENYLPROPANOLAMINE

2 of 2

Brompheniramine, Phenylephrine, Phenylpropanolamine also falls under PHENYLPROPANOLAMINE.

Theoretically, phenylpropanolamine might increase the risk of hypertension, as well as the levels and adverse effects of caffeine.
Green coffee can contain caffeine. Concomitant use of phenylpropanolamine and caffeine might cause an additive increase in blood pressure. Phenylpropanolamine also seems to increase caffeine serum levels.
Severity Moderate Likelihood Probable Evidence B

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..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the thing to know about this combo: your medicine contains decongestants (phenylephrine and phenylpropanolamine) that already tighten blood vessels and can nudge your blood pressure up. Green coffee adds caffeine, a stimulant, on top of that. Together they can have an additive effect on blood pressure, and the decongestant may also slow how fast your body clears caffeine, so the caffeine can build up a bit more than usual.

In real life that might show up as a faster heart rate, jitteriness, trouble sleeping, headache, or a higher blood pressure reading. This is largely theoretical and depends on how much caffeine the green coffee actually has, but it's worth a quick chat with your pharmacist or doctor before pairing them, especially if you have high blood pressure.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Brown NJ, Ryder D, Branch RA. A pharmacodynamic interaction between caffeine and phenylpropanolamine. Clin Pharmacol Ther 1991;50:363-71. PubMed
  2. Lake CR, Rosenberg DB, Gallant S, et al. Phenylpropanolamine increases plasma caffeine levels. Clin Pharmacol Ther 1990;47:675-85. 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

Green Coffee Also Interacts With Other Medications

Green Coffee has 8 major, 441 moderate, 222 minor known drug interactions in our database — the Brompheniramine, Phenylephrine, Phenylpropanolamine one above is among them. If you take anything else, check it against the full list below.

Major 8 Moderate 441 Minor 222 No known interaction 2,159 (incl. Brompheniramine, Phenylephrine, Phenylpropanolamine)
Taking anything else?

Check Another of Your Medications Against Green Coffee

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

Everything else you take

See Every Supplement That Interacts With Brompheniramine, Phenylephrine, Phenylpropanolamine

This page covers Green Coffee only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Brompheniramine, Phenylephrine, Phenylpropanolamine page lists 87 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Peyote (major), Rauvolfia Vomitoria (major) and Sida Cordifolia (major).

By severity: 5 major · 68 moderate · 14 minor.

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

“Anyone taking Normatane TD (brompheniramine, phenylephrine, phenylpropanolamine) for congestion is often also holding a coffee or an energy drink, and that pairing is exactly the problem. This list warrants real caution.”

Reviewed by 2 · Jul 18, 2026

Open the Brompheniramine, Phenylephrine, Phenylpropanolamine interaction page

One more smart check

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

We hold 1,716 real supplement products containing Green Coffee, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Green Coffee. Your product may carry other ingredients that interact with Brompheniramine, Phenylephrine, Phenylpropanolamine too, on top of Green Coffee — 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 Green Coffee and Brompheniramine, Phenylephrine, Phenylpropanolamine 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 Green Coffee
Steady interest

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

29 days ago today
Medication Brompheniramine, Phenylephrine, Phenylpropanolamine
Top half

#979 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 Green Coffee

What is Green Coffee?

Green Coffee
  • Weight loss
  • High blood pressure
  • Blood sugar control
  • Antioxidant support
  • General energy

Green coffee is the unroasted bean of the coffee plant, prized for its high chlorogenic acid content. Some early studies suggest modest benefits for weight, blood pressure, and blood sugar, but the evidence is limited and far from conclusive. It contains caffeine, so people sensitive to stimulants should use caution and check with a pharmacist or doctor first.

Read the full Green Coffee monograph & all interactions
Keep checking

Other Drugs & Green Coffee

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

8Major
441Moderate
222Minor
2,158No known interaction
8 Major 441 Moderate 222 Minor 2,158 No interaction
Major

8 interactions

Moderate

441 interactions

Showing 60 of 441 moderate interactions — see all 441 on the Green Coffee page.

Minor

222 interactions

Showing 60 of 222 minor interactions — see all 222 on the Green Coffee page.

No interaction 2,158 drugs checked — show the list

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

Showing the 60 most looked-up of 2,158 medications checked with no known interaction — see the full Green Coffee list.

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

Can you take Green Coffee with Brompheniramine, Phenylephrine, Phenylpropanolamine?
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 2 interactions listed for Green Coffee and Brompheniramine, Phenylephrine, Phenylpropanolamine?
Brompheniramine, Phenylephrine, Phenylpropanolamine belongs to more than one drug category, and Green Coffee 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 Green Coffee and Brompheniramine, Phenylephrine, Phenylpropanolamine 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, Phenylephrine, Phenylpropanolamine and Green Coffee?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.