Beta-methylphenethylamine (bmpea) + Aspirin, Caffeine, Dihydrocodeine Bitartrate
Aspirin, Caffeine, Dihydrocodeine Bitartrate brand name: Synalgos DC.
Aspirin, Caffeine, Dihydrocodeine Bitartrate falls into 3 drug categories that Beta-methylphenethylamine (bmpea) can interact with; the most serious is rated moderate. Theoretically, BMPEA might increase the levels and clinical effects of CYP2D6 substrates.
Read the full interaction reportBeta-methylphenethylamine (bmpea) and Aspirin, Caffeine, Dihydrocodeine Bitartrate
These two interact in 3 distinct ways. Each one is explained separately below.
Why Are There 3 Interactions?
Beta-methylphenethylamine (bmpea) interacts with whole categories of medication. Aspirin, Caffeine, Dihydrocodeine Bitartrate falls into 3 of those categories, so it can interact with Beta-methylphenethylamine (bmpea) in 3 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).
CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES
1 of 3Why this applies to Aspirin, Caffeine, Dihydrocodeine Bitartrate
Aspirin, Caffeine, Dihydrocodeine Bitartrate falls under CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES — the group Beta-methylphenethylamine (bmpea) interacts with.
In vitro research shows that BMPEA strongly inhibits CYP2D6.
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 wrinkle with Synalgos DC: the dihydrocodeine part is a prodrug. Your body uses an enzyme called CYP2D6 to convert it into the active painkiller that actually does the work. BMPEA, in lab studies, looks like it strongly blocks that same enzyme. So instead of building things up, blocking CYP2D6 could mean less of the active form gets made, which may leave you with weaker pain relief than expected.
Keep in mind this is theory based on test-tube data, not real-world human cases, so I don't want to alarm you. But BMPEA is a hidden amphetamine-like stimulant I'd steer clear of anyway, especially alongside the caffeine in this product. Please run it by your pharmacist or doctor before combining them.
- Liu Y, Santillo MF. Cytochrome P450 2D6 and 3A4 enzyme inhibition by amine stimulants in dietary supplements. Drug Test Anal. 2016;8(3-4):307-10. PubMed
CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES
2 of 3Aspirin, Caffeine, Dihydrocodeine Bitartrate also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.
In vitro research shows that BMPEA inhibits CYP3A4 by up to 37%.
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 thing with Synalgos DC (aspirin, caffeine, and dihydrocodeine): the dihydrocodeine part leans on a liver enzyme called CYP3A4 as one of the ways your body processes it. Lab studies suggest BMPEA may block that enzyme a little, by roughly a third. In theory, that could let more of the opioid linger in your system, which might add up to extra drowsiness, dizziness, constipation, nausea, or slowed breathing.
I want to be honest that this is a theoretical concern, seen in test tubes, not in real people, so I'm not ringing alarm bells. But BMPEA is a stimulant we frankly don't trust, and pairing any stimulant with an opioid plus caffeine isn't ideal for your heart. Please run this combo by your pharmacist or doctor before mixing them.
- Liu Y, Santillo MF. Cytochrome P450 2D6 and 3A4 enzyme inhibition by amine stimulants in dietary supplements. Drug Test Anal. 2016;8(3-4):307-10. PubMed
STIMULANT DRUGS
3 of 3Aspirin, Caffeine, Dihydrocodeine Bitartrate also falls under STIMULANT DRUGS.
BMPEA is thought to have stimulant effects, including cardiovascular effects such as hypertension, tachycardia, and cardiac arrest.
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.
The product you're asking about (Synalgos DC) is a combination pain reliever that contains aspirin, dihydrocodeine, and a dose of caffeine. That caffeine is the piece that matters here. Caffeine is a mild stimulant, and BMPEA is an amphetamine-like stimulant. Stacking two stimulants together can add up, and on paper that may push your heart rate and blood pressure higher than either one alone.
To be fair, this is a theoretical concern based on how these compounds behave, not on solid human studies, so I don't want to alarm you. Still, BMPEA is an unapproved, poorly studied ingredient with real cardiovascular warnings attached, so the cautious move is to avoid it. If you feel a racing heart, pounding chest, jitteriness, or a headache, check in with your pharmacist or doctor before combining them.
- Cohen PA, Bloszies C, Yee C, Gerona R. An amphetamine isomer whose efficacy and safety in humans has never been studied, ß-methylphenylethylamine (BMPEA), is found in multiple dietary supplements. Drug Test Anal. 2015 Apr 7. PubMed
- Brown DH, Hansson R, Oosthuizen F, et al. ß-Methylphenylethylamines: common fragmentation pathways with amphetamines in electrospray ionization collision-induced dissociation. Drug Test Anal 2016;8:344-50.
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.
Beta-methylphenethylamine (bmpea) Also Interacts With Other Medications
Beta-methylphenethylamine (bmpea) has 812 moderate known drug interactions in our database — the Aspirin, Caffeine, Dihydrocodeine Bitartrate one above is among them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Beta-methylphenethylamine (bmpea)
We haven’t checked that one against Beta-methylphenethylamine (bmpea) yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Beta-methylphenethylamine (bmpea). Pick one to open its full report.
See Every Supplement That Interacts With Aspirin, Caffeine, Dihydrocodeine Bitartrate
This page covers Beta-methylphenethylamine (bmpea) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Aspirin, Caffeine, Dihydrocodeine Bitartrate page lists 398 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), Asarabacca (major), Beer (major) and Danshen (major).
By severity: 17 major · 334 moderate · 47 minor.
Open the Aspirin, Caffeine, Dihydrocodeine Bitartrate interaction page
Where Beta-methylphenethylamine (bmpea) and Aspirin, Caffeine, Dihydrocodeine Bitartrate 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.
#923 of 1,452 supplements looked up here in the last 7 days
#366 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 Beta-methylphenethylamine (bmpea)
What is Beta-methylphenethylamine (bmpea)?
- Weight loss
- Pre-workout energy
- Athletic performance
- Appetite suppression
- Mental focus
Beta-methylphenethylamine (BMPEA) is a synthetic stimulant chemically similar to amphetamine that has been found in some weight-loss and sports supplements, often without being clearly listed on the label. It is not an approved or well-studied dietary ingredient, and regulators have warned that it may carry real cardiovascular risks. Because of safety concerns and the lack of human research, it is best avoided.
Other Drugs & Beta-methylphenethylamine (bmpea)
Browse every other medication we’ve checked against Beta-methylphenethylamine (bmpea) — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
812 interactions
- Diltiazem ›
- Nifedipine ›
- Phentermine ›
- Hydrocortisone ›
- Methylphenidate ›
- Erythromycin ›
- Estradiol ›
- Propranolol ›
- Lidocaine ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Levonorgestrel ›
- Phenylpropanolamine ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Triazolam ›
- Zopiclone ›
- Colchicine ›
- Fentanyl ›
- Nicotine ›
- Oxybutynin ›
- Oxycodone ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Doxorubicin ›
- Fluticasone ›
- Formoterol ›
- Miconazole ›
- Morphine Sulfate ›
- Phenylephrine ›
- Pseudoephedrine ›
- Amphetamine ›
- Buprenorphine ›
- Conjugated Estrogens ›
- Diazepam ›
- Diethylpropion ›
- Everolimus ›
- Ivabradine ›
- Lofepramine ›
- Medroxyprogesterone ›
- Medroxyprogesterone Acetate ›
- Nortriptyline ›
- Propoxyphene ›
- Rifampin ›
- Testosterone Undecanoate ›
- Aripiprazole ›
- Caffeine (otc Drug) ›
- Ciclesonide ›
- Clonazepam ›
- Cyclobenzaprine ›
- Dapsone ›
- Desipramine ›
Showing 60 of 812 moderate interactions — see all 812 on the Beta-methylphenethylamine (bmpea) page.
No interaction 2,017 drugs checked — show the list
We also checked Beta-methylphenethylamine (bmpea) against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Ivermectin ›
- Acetaminophen ›
- Aspirin ›
- Rosuvastatin ›
- Escitalopram ›
- Tirzepatide ›
- Ibuprofen ›
- Docusate ›
- Sumatriptan ›
- Valacyclovir ›
- Hydroxyurea ›
- Isotretinoin ›
- Semaglutide ›
- Metformin ›
- Methotrexate ›
- Amoxicillin ›
- Lisinopril ›
- Bupropion ›
- Doxycycline ›
- Bendamustine ›
- Pregabalin ›
- Lamotrigine ›
- Acyclovir ›
- Azithromycin ›
- Gabapentin ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Methylene Blue ›
- Ciprofloxacin ›
- Candesartan Cilexetil ›
- Amoxicillin, Clavulanate Potassium ›
- Acetaminophen, Aspirin ›
- Cyclopentolate ›
- Acetylsalicylic Acid ›
- Cephalexin ›
- Ezetimibe ›
- Carbidopa, Levodopa ›
- Acetaminophen, Dextromethorphan, Doxylamine ›
- Levetiracetam ›
- Thyroid Hormone ›
- Mannitol ›
- Roxithromycin ›
- Levodopa ›
- Spironolactone ›
- Valsartan ›
- Phentermine, Topiramate ›
- Insulin Degludec, Liraglutide ›
- Levothyroxine Sodium ›
- Atenolol ›
- Mitomycin ›
- Canagliflozin, Metformin ›
- Acetaminophen, Ibuprofen ›
- Minoxidil ›
- Alginic Acid, Aluminum Hydroxide ›
- Magnesium Hydroxide (otc Drug) ›
- Daptomycin ›
- Acenocoumarol ›
- Acarbose ›
- Abrocitinib ›
Showing the 60 most looked-up of 2,017 medications checked with no known interaction — see the full Beta-methylphenethylamine (bmpea) 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
Aspirin, Caffeine, Dihydrocodeine Bitartrate Is Linked to Lower Levels of 4 Nutrients
Natural Medicines records Aspirin, Caffeine, Dihydrocodeine Bitartrate as a medicine that can lower these. This is not an interaction with Beta-methylphenethylamine (bmpea) — 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 Aspirin, Caffeine, Dihydrocodeine Bitartrate 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 Beta-methylphenethylamine (bmpea) and Aspirin, Caffeine, Dihydrocodeine Bitartrate Together: Common Questions
Can you take Beta-methylphenethylamine (bmpea) with Aspirin, Caffeine, Dihydrocodeine Bitartrate?
Why are there 3 interactions listed for Beta-methylphenethylamine (bmpea) and Aspirin, Caffeine, Dihydrocodeine Bitartrate?
How serious is the Beta-methylphenethylamine (bmpea) and Aspirin, Caffeine, Dihydrocodeine Bitartrate interaction?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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