Cassie Absolute + Dextromethorphan HBr, Guaifenesin
Dextromethorphan HBr, Guaifenesin brand names: Vicks Formula 44E Cough & Chest Congestion Relief, Pediatric Vicks Formula 44e Cough & Chest Congesti.
We found no known interaction between Cassie Absolute and Dextromethorphan HBr, Guaifenesin in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.
Cassie Absolute and Dextromethorphan HBr, Guaifenesin
We checked these two against our interaction database. Here is what we found.
No Known Interaction Found
We did not find a documented interaction between Dextromethorphan HBr, Guaifenesin and Cassie Absolute in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.
Worth understanding: our licensed dataset holds no drug-interaction record for Cassie Absolute at all — not against Dextromethorphan HBr, Guaifenesin, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.
If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.
Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.
Cassie Absolute safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
See Every Supplement That Interacts With Dextromethorphan HBr, Guaifenesin
This page covers Cassie Absolute only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Dextromethorphan HBr, Guaifenesin page lists 171 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Grapefruit (major), Lithium (major), St. John's Wort (major) and 1,3-dmaa (moderate).
By severity: 4 major · 125 moderate · 42 minor.
From our pharmacist’s overview on the Dextromethorphan HBr, Guaifenesin page
“A bad cough tends to hit when supplements are already on the counter, and anyone reaching for Vicks Formula 44E (dextromethorphan HBr and guaifenesin) should treat this list with real care, since 4 of its 171 entries carry a major rating. Two themes dominate.”
Reviewed by 2 · Jul 18, 2026
Where Cassie Absolute and Dextromethorphan HBr, Guaifenesin 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.
#1,233 of 1,452 supplements looked up here in the last 7 days
#913 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.
Where does our data come from?
- Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions. Cassie Absolute is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Cassie Absolute reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Cassie Absolute and Dextromethorphan HBr, Guaifenesin records this page draws on were last updated June 22, 2026.
- What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
About Cassie Absolute
What is Cassie Absolute?
- Perfume and fragrance
- Aromatherapy for relaxation
- Skin care preparations
- Traditional folk remedies
Cassie Absolute is a fragrant extract made from the flowers of the Acacia farnesiana tree, used mainly in perfumes and aromatherapy. There is very little scientific evidence that it treats any medical condition, and like other essential oils it should never be swallowed and should be diluted before skin use. Talk to a pharmacist or doctor before using it for health reasons.
Acacia farnesiana · Fabaceae · Flowers (used to produce an aromatic absolute/essential oil) · Essential oil (absolute), perfume ingredient, aromatherapy blends
An interaction check asks whether these two react with each other — it does not ask whether Cassie Absolute is a good idea for someone in your situation. Here is what our Cassie Absolute record says about it on its own.
Cassie Absolute: dosing
There is no established medicinal dose for Cassie Absolute. It is sold as a fragrance and aromatherapy oil, not as a standardized supplement, so reliable dosing guidelines do not exist.If you use it on the skin, follow the product label and dilute it well in a carrier oil. For aromatherapy, a few drops in a diffuser is typical for scent.
From our Cassie Absolute monograph — the full record covers uses, side effects and every documented interaction.
About Dextromethorphan HBr, Guaifenesin
Most-Reported Side Effects for Dextromethorphan HBr, Guaifenesin
From FAERS, the FDA’s public side-effect reporting system (1,675 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Cassie Absolute
Browse every other medication we’ve checked against Cassie Absolute — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Cassie Absolute against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Ivermectin ›
- Metoprolol ›
- Aspirin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Acetaminophen ›
- Escitalopram ›
- Tadalafil ›
- Clopidogrel ›
- Abemaciclib ›
- Atorvastatin ›
- Docusate ›
- Hydroxyurea ›
- Valacyclovir ›
- Ibuprofen ›
- Methamphetamine ›
- Sumatriptan ›
- Tirzepatide ›
- Semaglutide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Metformin ›
- Bupropion ›
- Amoxicillin ›
- Lisinopril ›
- Bendamustine ›
- Acyclovir ›
- Amitriptyline ›
- Methotrexate ›
- Doxycycline ›
- Fluoxetine ›
- Amphetamine ›
- Acetaminophen, Codeine ›
- Lamotrigine ›
- Pregabalin ›
- Azithromycin ›
- Gabapentin ›
- Dextroamphetamine ›
- Isotretinoin ›
- Clonazepam ›
- Methylene Blue ›
- Omeprazole ›
- Amlodipine Besylate ›
- Quetiapine ›
- Duloxetine ›
- Letrozole ›
- Naproxen ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Cassie Absolute list.
Cassie Absolute References
The 1 sources that drive our Cassie Absolute monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Cassie Absolute is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.
- Essential Oils: An Overview — Cleveland Clinic Source
Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Taking Cassie Absolute and Dextromethorphan HBr, Guaifenesin Together: Common Questions
Is it safe to take Cassie Absolute with Dextromethorphan HBr, Guaifenesin?
Does Dextromethorphan HBr, Guaifenesin interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Keep Exploring
Still Have a Question About Dextromethorphan HBr, Guaifenesin and Cassie Absolute?
Our pharmacists answer your medication & supplement questions — free.
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.