Yerba Santa + Cladribine
Cladribine brand names: Leustatin, Mavenclad.
We found no known interaction between Yerba Santa and Cladribine 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.
Yerba Santa and Cladribine
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 Cladribine and Yerba Santa 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.
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.
Yerba Santa safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Why No Interaction Is Listed for Cladribine
Interactions in our licensed database are recorded against drug classes, not just single drug names. Cladribine is filed under 2 classifications — immunosuppressants, oral drugs. Yerba Santa has documented interactions with 1 drug class — the most serious being lithium (moderate) — and none of Cladribine’s classifications are among them.
Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.
Yerba Santa Does Interact With Other Medications
Yerba Santa has 1 moderate known drug interaction in our database — Cladribine isn’t one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Yerba Santa
We haven’t checked that one against Yerba Santa yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Yerba Santa. Pick one to open its full report.
See Every Supplement That Interacts With Cladribine
This page covers Yerba Santa only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cladribine page lists 70 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Active Hexose Correlated Compound (ahcc) (moderate), Alfalfa (moderate), American Ginseng (moderate) and Andrographis (moderate).
By severity: 1 major · 59 moderate · 10 minor.
From our pharmacist’s overview on the Cladribine page
“Cladribine (Leustatin, Mavenclad) treats hairy cell leukemia and relapsing multiple sclerosis by deliberately knocking down part of the immune system, so this list calls for real vigilance. Of the 70 supplements and herbs on file, 53 are immune stimulators, herbs like astragalus, ashwagandha, and ginseng that could push immunity back u…”
Reviewed by 2 · Jul 18, 2026
Taking Yerba Santa as Part of a Dietary Supplement Product? Check It for Interactions
We hold 276 real supplement products containing Yerba Santa, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Yerba Santa. Even though Yerba Santa itself has no known interaction with Cladribine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Yerba Santa and Cladribine 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.
#677 of 1,452 supplements looked up here in the last 7 days
#2,120 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.
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources.
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Yerba Santa and Cladribine 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 Yerba Santa
What is Yerba Santa?
- Coughs and colds
- Chest congestion (expectorant)
- Asthma and bronchitis
- Sore throat
- Masking bitter tastes in medicines
Yerba Santa is an aromatic shrub from the western United States and Mexico that has long been used in folk medicine for coughs, congestion, and other respiratory complaints. Modern scientific evidence supporting these uses is very limited, with most data coming from laboratory studies rather than human trials. It is best known today as a flavoring agent that helps mask the bitter taste of medicines; talk to a pharmacist or doctor before using it for health purposes.
Eriodictyon californicum · Boraginaceae · Leaves · Tea, tincture, capsules, syrup, dried leaf, throat lozenges, and as a flavoring agent
An interaction check asks whether these two react with each other — it does not ask whether Yerba Santa is a good idea for someone in your situation. Here is what our Yerba Santa record says about it on its own.
Yerba Santa: dosing
There is no established standardized dose for Yerba Santa, and the amount of active compounds can vary a lot from product to product. Because of this, it is hard to recommend a specific safe and effective dose.If you choose to use it, follow the directions on the product label and do not exceed the recommended amount. A pharmacist or doctor can help you decide whether it is appropriate for you, especially if you take other medicines or have a health condition. Do not use it as a replacement for proven treatments for asthma or infections.
From our Yerba Santa monograph — the full record covers uses, side effects and every documented interaction.
About Cladribine
What Is Cladribine Used For?
Brand names: Leustatin, Mavenclad
Cladribine tablets (brand name Mavenclad) are used to treat relapsing forms of multiple sclerosis (MS) in adults — specifically relapsing-remitting MS and active secondary progressive MS. Because of its significant safety profile, it is generally reserved for patients who haven't responded well to, or can't tolerate, other MS medicines. It is not recommended for clinically isolated syndrome (CIS), a first episode that may or may not lead to MS.
Cladribine injection (given intravenously) is a separate product used to treat active hairy cell leukemia — a rare blood cancer — in patients who have clinically significant anemia, low white blood cell counts, low platelets, or disease-related symptoms.
Most-Reported Side Effects for Cladribine
From FAERS, the FDA’s public side-effect reporting system (9,555 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Yerba Santa
Browse every other medication we’ve checked against Yerba Santa — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
1 interaction
No interaction 2,828 drugs checked — show the list
We also checked Yerba Santa against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Ivermectin ›
- Losartan Potassium ›
- Aspirin ›
- Abemaciclib ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Tadalafil ›
- Tirzepatide ›
- Methamphetamine ›
- Ibuprofen ›
- Warfarin Sodium ›
- Valacyclovir ›
- Hydroxyurea ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Amitriptyline ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Doxycycline ›
- Fluoxetine ›
- Azithromycin ›
- Acyclovir ›
- Pregabalin ›
- Lamotrigine ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Levothyroxine, Liothyronine ›
- Clonazepam ›
- Quetiapine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Duloxetine ›
- Methylene Blue ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,828 medications checked with no known interaction — see the full Yerba Santa list.
Sources & How We Checked
We checked Yerba Santa against Cladribine in the Natural Medicines interaction database and found no documented interaction on file. The medication overview comes from MedlinePlus, and supplement label details from the NIH Dietary Supplement Label Database.
- 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
Taking Yerba Santa and Cladribine Together: Common Questions
Is it safe to take Yerba Santa with Cladribine?
How was the Yerba Santa and Cladribine combination checked?
Does Yerba Santa interact with any other medications?
Does Cladribine interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Still Have a Question About Cladribine and Yerba Santa?
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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.