Echinacea + Caffeine (prescription drug)
Caffeine (prescription drug) brand names: Dextrophin, Caffeine.
Caffeine (prescription drug) falls into 3 drug categories that Echinacea can interact with; the most serious is rated moderate. Echinacea might inhibit the metabolism of CYP1A2 and increase plasma levels of some drugs.
Read the full interaction reportEchinacea and Caffeine (prescription drug)
These two interact in 3 distinct ways. Each one is explained separately below.
Why Are There 3 Interactions?
Echinacea interacts with whole categories of medication. Caffeine (prescription drug) falls into 3 of those categories, so it can interact with Echinacea in 3 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).
CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES
1 of 3Why this applies to Caffeine (prescription drug)
Caffeine (prescription drug) falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES — the group Echinacea interacts with.
Echinacea appears to inhibit CYP1A2 enzymes in humans. Additionally, echinacea seems to increase plasma concentrations of caffeine, a CYP1A2 substrate, by around 30%. Theoretically, echinacea might increase levels of other drugs metabolized by CYP1A2.
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.
Here's the deal with these two together. Your body relies on an enzyme called CYP1A2 to clear caffeine out of your system. Echinacea appears to slow that enzyme down, so caffeine hangs around longer. In one study, echinacea bumped caffeine levels up by about 30%, meaning a normal dose can feel a bit stronger or last longer than usual.
In real life, that might show up as more jitteriness, a racing or pounding heart, trouble sleeping, or an upset stomach. The effect is modest and isn't dangerous for most healthy folks, but if caffeine already makes you wired, you may notice it more. Don't change your dose on your own. Just give your pharmacist or doctor a quick heads-up so they can guide you.
- Gorski JC, Huang S, Zaheer NA, et al. The effect of echinacea (Echinacea purpurea root) on cytochrome P450 activity in vivo.Clin Pharmacol Ther 2003;73 (Abstract PDII-A-8):P94. PubMed
CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES
2 of 3Caffeine (prescription drug) also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.
Several clinical trials have shown that taking echinacea for up to one month does not significantly affect the metabolism of various CYP3A4 substrates, including midazolam, docetaxel, etravirine, lopinavir-ritonavir, and darunavir-ritonavir. However, other clinical research shows that echinacea may increase the clearance of midazolam, suggesting that echinacea might induce CYP3A4. The discrepancy is thought to be due to differing effects of echinacea on intestinal versus hepatic CYP3A4 enzymes. Echinacea appears to induce hepatic CYP3A4 but inhibit intestinal CYP3A4. In some cases, these effects might cancel each other out, but in others, drug levels may be increased or decreased depending on the level of effect at hepatic and intestinal sites. The effect of echinacea on CYP3A4 activity may differ depending on the CYP3A4 substrate.
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.
Here's the honest picture with echinacea and prescription caffeine. Echinacea can nudge a liver enzyme called CYP3A4, sometimes speeding it up and sometimes slowing it down depending on whether the action happens in the gut or the liver. In real-world studies, those two effects often roughly balance out, so a big change in caffeine isn't guaranteed.
If anything shifts, you might notice slightly stronger caffeine effects (jitteriness, a racing heart, trouble sleeping) or a bit weaker effect. The evidence here is modest and mixed, so I wouldn't lose sleep over it. Caffeine is mostly cleared by a different enzyme (CYP1A2) anyway. Still, if you take echinacea regularly, mention it to your pharmacist or doctor so they can keep an eye on how you feel.
- 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
- Yale SH, Glurich I. Analysis of the inhibitory potential of Ginkgo biloba, Echinacea purpurea, and Serenoa repens on the metabolic activity of cytochrome P450 3A4, 2D6, and 2C9. J Altern Complement Med 2005;11:433-9.
- Gorski JC, Huang S, Zaheer NA, et al. The effect of echinacea (Echinacea purpurea root) on cytochrome P450 activity in vivo.Clin Pharmacol Ther 2003;73 (Abstract PDII-A-8):P94. PubMed
- Gurley BJ, Gardner SF, Hubbard MA, et al. In vivo assessment of botanical supplementation on human cytochrome P450 phenotypes: Citrus aurantium, Echinacea purpurea, milk thistle, and saw palmetto. Clin Pharmacol Ther 2004;76:428-40. .
- Penzak, S. R., Robertson, S. M., Hunt, J. D., Chairez, C., Malati, C. Y., Alfaro, R. M., Stevenson, J. M., and Kovacs, J. A. Echinacea purpurea significantly induces cytochrome P450 3A activity but does not alter lopinavir-ritonavir exposure in healthy s
- Schroder-Aasen T, Molden G, Nilsen OG. In vitro inhibition of CYP3A4 by the multiherbal commercial product Sambucus Force and its main constituents Echinacea purpurea and Sambucus nigra. Phytother Res 2012;26(11):1606-13.
- Goey AK, Meijerman I, Rosing H, et al. The effect of Echinacea purpurea on the pharmacokinetics of docetaxel. Br J Clin Pharmacol 2013;76(3):467-74.
- Moltó J, Valle M, Miranda C, et al. Herb-drug interaction between Echinacea purpurea and etravirine in HIV-infected patients. Antimicrob Agents Chemother 2012;56(10):5328-31. PubMed
- Hansen TS, Nilsen OG. In vitro CYP3A4 metabolism: inhibition by Echinacea purpurea and choice of substrate for the evaluation of herbal inhibition. Basic Clin Pharmacol Toxicol 2008;103:445-9.
CAFFEINE
3 of 3Echinacea seems to increase plasma concentrations of caffeine by around 30%. This is likely due to inhibition of cytochrome P450 1A2 (CYP1A2) by echinacea.
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..
Here's the simple version: your body clears caffeine mainly through a liver enzyme called CYP1A2. Echinacea appears to slow that enzyme down, so caffeine doesn't get broken down as quickly and can build up in your blood, by roughly 30% in one study. So the caffeine you take ends up hitting a little harder and sticking around longer than usual.
In real life, that can mean more of the usual caffeine effects: jitteriness, a racing or pounding heartbeat, trouble sleeping, anxiety, or an upset stomach. It's usually a manageable change rather than a dangerous one, but if you notice any of these, mention it to your pharmacist or doctor. They can help you adjust timing or dosing safely. Please don't stop or change either one on your own.
- Gorski JC, Huang S, Zaheer NA, et al. The effect of echinacea (Echinacea purpurea root) on cytochrome P450 activity in vivo.Clin Pharmacol Ther 2003;73 (Abstract PDII-A-8):P94. PubMed
What These Ratings Mean
Every interaction above is graded three ways — here’s the key to each label.
Clinically significant. Avoid the combination, or use only under close professional supervision.
Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.
Generally not serious. Be aware of it and mention it to your pharmacist.
- 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.
- 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.
Echinacea Also Interacts With Other Medications
Echinacea has 814 moderate, 1 minor known drug interactions in our database — the Caffeine (prescription drug) one above is among them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Echinacea
We haven’t checked that one against Echinacea yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Echinacea. Pick one to open its full report.
Questions About Echinacea or Caffeine (prescription drug)
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Echinacea or Caffeine (prescription drug), 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:
- Can You Take Echinacea With Antibiotics? ›
- What Supplements or Foods Help Prevent Catching a Cold? ›
Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.
See Every Supplement That Interacts With Caffeine (prescription drug)
This page covers Echinacea only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Caffeine (prescription drug) page lists 208 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), Peyote (major) and Rauvolfia Vomitoria (major).
By severity: 7 major · 155 moderate · 46 minor.
From our pharmacist’s overview on the Caffeine (prescription drug) page
“Prescription caffeine is itself a stimulant, which is exactly why this list calls for genuine care rather than a quick skim. Seven of the 208 ingredients on file are rated major, and those deserve attention first.”
Reviewed by 2 · Jul 18, 2026
Taking Echinacea as Part of a Dietary Supplement Product? Check It for Interactions
We hold 350 real supplement products containing Echinacea, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Echinacea. Your product may carry other ingredients that interact with Caffeine (prescription drug) too, on top of Echinacea — and those would not show on this page. Find your product and we’ll check every ingredient on its label:
Where Echinacea and Caffeine (prescription drug) 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.
#60 of 1,452 supplements looked up here in the last 7 days
#360 of 2,830 medications looked up here in the last 7 days
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.
About Echinacea
What is Echinacea?
- Common cold
- Flu and respiratory infections
- Immune support
- Sore throat
- Wound and skin care (traditional)
Echinacea is a popular herb taken to help prevent or shorten the common cold, but study results are mixed and the overall benefit appears small at best. It is generally well tolerated for short-term use in most healthy adults, though people with allergies to daisy-family plants and those who are pregnant or breastfeeding should be cautious and talk to a pharmacist or doctor first.
About Caffeine
What Is Caffeine Used For?
Brand names: Dextrophin, Caffeine
Caffeine citrate injection and oral solution are used for the short-term treatment of apnea of prematurity. This means pauses in breathing in premature infants. The label lists the age range as infants between 28 weeks and a later gestational age, and that range is cut off in the text provided.
Over-the-counter caffeine tablets, such as Diurex and the Stay Awake products, are taken by mouth by adults and older children. Their labels point to fatigue and drowsiness. Diurex directions also mention taking it while symptoms persist.
Other Drugs & Echinacea
Browse every other medication we’ve checked against Echinacea — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
814 interactions
- Diltiazem ›
- Theophylline ›
- Nifedipine ›
- Hydrocortisone ›
- Naproxen ›
- Erythromycin ›
- Estradiol ›
- Propranolol ›
- Lidocaine ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Levonorgestrel ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Triazolam ›
- Zopiclone ›
- Colchicine ›
- Fentanyl ›
- Oxybutynin ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Triamcinolone ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Doxorubicin ›
- Fluticasone ›
- Miconazole ›
- Acetaminophen ›
- Buprenorphine ›
- Conjugated Estrogens ›
- Diazepam ›
- Everolimus ›
- Ivabradine ›
- Lofepramine ›
- Medroxyprogesterone ›
- Medroxyprogesterone Acetate ›
- Nortriptyline ›
- Rifampin ›
- Testosterone Undecanoate ›
- Aripiprazole ›
- Bendamustine ›
- Betamethasone ›
- Caffeine (otc Drug) ›
- Ciclesonide ›
- Clonazepam ›
- Cyclobenzaprine ›
- Dapsone ›
- Desipramine ›
- Erythromycin Ethylsuccinate ›
- Erythromycin Stearate ›
- Etoposide ›
- Fluticasone Propionate ›
- Hydroxyzine ›
- Itraconazole ›
Showing 60 of 814 moderate interactions — see all 814 on the Echinacea page.
1 interaction
No interaction 2,014 drugs checked — show the list
We also checked Echinacea against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Methylphenidate ›
- Ivermectin ›
- Aspirin ›
- Rosuvastatin ›
- Metoprolol ›
- Escitalopram ›
- Isotretinoin ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Docusate ›
- Hydroxyurea ›
- Valacyclovir ›
- Sumatriptan ›
- Metformin ›
- Semaglutide ›
- Lisdexamfetamine ›
- Amphetamine ›
- Levothyroxine, Liothyronine ›
- Methotrexate ›
- Amoxicillin ›
- Lisinopril ›
- Bupropion ›
- Fluoxetine ›
- Azithromycin ›
- Pregabalin ›
- Doxycycline ›
- Gabapentin ›
- Dextroamphetamine ›
- Lamotrigine ›
- Acyclovir ›
- Duloxetine ›
- Methylene Blue ›
- Ciprofloxacin ›
- Candesartan Cilexetil ›
- Amoxicillin, Clavulanate Potassium ›
- Acetylsalicylic Acid ›
- Bisoprolol ›
- Insulin Degludec, Liraglutide ›
- Calcium Oxybate, Magnesium Oxybate, Potassium Oxybate, Sodium Oxybate ›
- Aluminum Hydroxide, Aspirin, Magnesium Hydroxide ›
- Ezetimibe ›
- Isoniazid, Pyrazinamide, Rifampin ›
- Cyclopentolate ›
- Cephalexin ›
- Avatrombopag Maleate ›
- Atenolol, Chlorthalidone ›
- Thyroid Hormone ›
- Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide ›
- Carbidopa, Levodopa ›
- Levetiracetam ›
- Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide ›
- Bendroflumethiazide, Rauwolfia Serpentina ›
- Mannitol ›
- Levodopa ›
- Roxithromycin ›
- Sacubitril, Valsartan ›
- Amphetamine Aspartate, Amphetamine Sulfate, Dextroamphetamine Saccharate, Dextroamphetamine Sulfate ›
- Canagliflozin, Metformin ›
Showing the 60 most looked-up of 2,014 medications checked with no known interaction — see the full Echinacea list.
Sources & How We Checked
Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference for vitamins, herbs and supplements — the basis for our interaction data.
- MedlinePlus, U.S. National Library of Medicine — NIH consumer drug information, used for the medication overviews.
- NIH Dietary Supplement Label Database (DSLD) — Official supplement product labels.
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
Caffeine (prescription drug) Is Linked to Lower Levels of One Nutrient
Natural Medicines records Caffeine (prescription drug) as a medicine that can lower these. This is not an interaction with Echinacea — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Read the full Caffeine (prescription drug) nutrient depletion report ›
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Echinacea and Caffeine (prescription drug) Together: Common Questions
Can you take Echinacea with Caffeine (prescription drug)?
Why are there 3 interactions listed for Echinacea and Caffeine (prescription drug)?
How serious is the Echinacea and Caffeine (prescription drug) interaction?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Still Have a Question About Caffeine (prescription drug) and Echinacea?
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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.