Red-spur Valerian + Guaifenesin
Guaifenesin brand names: Robitussin, Humibid LA, Amibid LA, Numobid, Muco-Fen 800, and others.
We found no known interaction between Red-spur Valerian and 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.
Red-spur Valerian and 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 Guaifenesin and Red-spur Valerian 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 Red-spur Valerian at all — not against 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.
Red-spur Valerian safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Questions About Red-spur Valerian or Guaifenesin
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Red-spur Valerian or Guaifenesin, 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:
- Does Prednisone Stop Cough or Clear Mucus? ›
- Can You Take Mullein Drops With Mucinex for COPD? ›
- Can You Take Amoxicillin With Mucinex Or Sudafed? ›
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 Guaifenesin
This page covers Red-spur Valerian only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Guaifenesin page lists 26 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Grapefruit (major), Berberine (moderate), Bitter Orange (moderate) and Coffee Charcoal (moderate).
By severity: 2 major · 15 moderate · 9 minor.
From our pharmacist’s overview on the Guaifenesin page
“Guaifenesin (Robitussin, Humibid LA) loosens chest mucus, and by itself it is a mild medicine, but two of the 26 supplements on this list rate major, so those two deserve your attention first. Activated charcoal can bind the drug in your gut and blunt what it does, and grapefruit raises blood levels of dextromethorphan, the cough suppr…”
Reviewed by 2 · Jul 18, 2026
Where Red-spur Valerian and 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.
#904 of 1,452 supplements looked up here in the last 7 days
#166 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. Red-spur Valerian 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 Red-spur Valerian reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Red-spur Valerian and 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 Red-spur Valerian
What is Red-spur Valerian?
- Sleep and relaxation
- Anxiety and nervousness
- Digestive upset
- Headaches
Red-spur valerian (Centranthus ruber) is a Mediterranean ornamental plant that has been used in folk medicine as a mild sedative, but there is almost no modern scientific research to support these uses. It is a different plant from true valerian (Valeriana officinalis), and its safety has not been well studied, so caution is warranted—especially during pregnancy, breastfeeding, and in children.
Centranthus ruber · Caprifoliaceae · Roots, leaves, and flowering tops · Rarely sold as a commercial supplement; traditionally used as teas or dried plant preparations
An interaction check asks whether these two react with each other — it does not ask whether Red-spur Valerian is a good idea for someone in your situation. Here is what our Red-spur Valerian record says about it on its own.
Red-spur Valerian: dosing
There is no established or standardized dose for red-spur valerian. It is not a common commercial supplement, and reliable dosing guidelines have not been set through research.If you find a product that contains it, follow the directions on the label and do not exceed the recommended amount.
From our Red-spur Valerian monograph — the full record covers uses, side effects and every documented interaction.
About Guaifenesin
What Is Guaifenesin Used For?
Brand names: Robitussin, Humibid LA, Amibid LA, Numobid, Muco-Fen 800, Bidex, Organidin, X-pect, Mucinex
Guaifenesin helps loosen phlegm (mucus) and thin bronchial secretions — the sticky fluid in your airways — so your cough can clear it out more effectively. It is used to relieve chest congestion associated with colds, respiratory infections, and other conditions that cause a mucus-filled cough.
This use is supported across multiple products including tablets, extended-release tablets, and oral solutions such as Childrens Mucus Relief, Tussin, Guaifenesin STRAWBERRY-BANANA FLAVOR, 12 Hour Mucus Relief, 365 Whole Foods Market Guaifenesin, Dr. Simi Mucus Relief, and others.
Other Drugs & Red-spur Valerian
Browse every other medication we’ve checked against Red-spur Valerian — 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 Red-spur Valerian 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 ›
- Rivaroxaban ›
- Aspirin ›
- Rosuvastatin ›
- Acetaminophen ›
- Escitalopram ›
- Abemaciclib ›
- Clopidogrel ›
- Tadalafil ›
- Atorvastatin ›
- Docusate ›
- Valacyclovir ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Warfarin Sodium ›
- Semaglutide ›
- Sumatriptan ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Metformin ›
- Lisinopril ›
- Amoxicillin ›
- Bupropion ›
- Amitriptyline ›
- Methotrexate ›
- Bendamustine ›
- Acyclovir ›
- Doxycycline ›
- Fluoxetine ›
- Amphetamine ›
- Lamotrigine ›
- Pregabalin ›
- Isotretinoin ›
- Azithromycin ›
- Acetaminophen, Codeine ›
- Gabapentin ›
- Dextroamphetamine ›
- Amlodipine Besylate ›
- Clonazepam ›
- Methylene Blue ›
- Omeprazole ›
- Quetiapine ›
- Letrozole ›
- Duloxetine ›
- Naproxen ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Red-spur Valerian list.
Red-spur Valerian References
The 2 sources that drive our Red-spur Valerian monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Red-spur Valerian is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.
- Valerian - Health Professional Fact Sheet — NIH Office of Dietary Supplements Source
- Valerian — NIH NCCIH 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 Red-spur Valerian and Guaifenesin Together: Common Questions
Is it safe to take Red-spur Valerian with Guaifenesin?
Does Guaifenesin interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.