Ascorbigen + Pembrolizumab
Pembrolizumab brand name: Keytruda.
We found no known interaction between Ascorbigen and Pembrolizumab 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.
Ascorbigen and Pembrolizumab
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 Pembrolizumab and Ascorbigen 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 Ascorbigen at all — not against Pembrolizumab, 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.
Ascorbigen safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
What Pembrolizumab Is Prescribed For, and What Ascorbigen Has Been Studied For
These two come up together because they touch the same health topic — not because they do the same job. Pembrolizumab is a prescription medicine with approved uses on its FDA label. Ascorbigen is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.
Pembrolizumab is prescribed for: Pembrolizumab is used to treat a wide range of cancers — including melanoma (skin cancer), lung cancer, head and neck cancers, bladder cancer, certain colorectal cancers, cervical cancer, kidney cancer, liver cancer, and many others. It can be used alone or combined with chemotherapy, depending on the cancer type and stage. For some cancers, it's given before surgery (neoadjuvant), after surgery (adjuvant), or both — to help shrink tumors or reduce the chance the cancer comes back. Some uses require a lab test to confirm your tumor has certain markers (like PD-L1 expression) before starting treatment.
Ascorbigen has been studied for:
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Breast cancer studied, not established Ascorbigen has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows
Ascorbigen for breast cancer
Although there has been interest in using oral ascorbigen for the prevention of breast cancer, there is insufficient reliable information about the clinical effects of ascorbigen for this purpose.
Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Pembrolizumab on your own; if you are taking Ascorbigen for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.
See Every Supplement That Interacts With Pembrolizumab
This page covers Ascorbigen only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Pembrolizumab page lists 1 supplement it has a documented interaction with, worst first, each one explained.
The most serious there right now: American Pawpaw (minor).
By severity: 1 minor.
From our pharmacist’s overview on the Pembrolizumab page
“For a drug used against so many different cancers, pembrolizumab (Keytruda) has a remarkably short supplement file. Just one ingredient appears on it, American pawpaw, and even that lone entry is rated minor and judged unlikely to cause real trouble.”
Reviewed by 2 · Jul 18, 2026
Taking Ascorbigen as Part of a Dietary Supplement Product? Check It for Interactions
We hold 2 real supplement products containing Ascorbigen, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Ascorbigen. Even though Ascorbigen itself has no known interaction with Pembrolizumab, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Ascorbigen and Pembrolizumab 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.
#1,051 of 1,452 supplements looked up here in the last 7 days
#886 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. See every Ascorbigen reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Ascorbigen and Pembrolizumab records this page draws on were last updated July 10, 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 Ascorbigen
What is Ascorbigen?
- Antioxidant support
- Immune support
- Fibromyalgia symptoms
- General wellness
- Detoxification support
Ascorbigen is a natural compound formed when indole-3-carbinol (from cruciferous vegetables) combines with vitamin C, and it is mainly studied in the lab and in early research. There is not enough good human evidence to confirm it helps any specific health condition, and its safety as a supplement is not well established. Talk with your pharmacist or doctor before taking it.
Derived from cruciferous vegetables (such as cabbage, broccoli, Brussels sprouts) · Capsules, tablets, found naturally in cruciferous vegetables and some combination supplements
An interaction check asks whether these two react with each other — it does not ask whether Ascorbigen is a good idea for someone in your situation. Here is what our Ascorbigen record says about it on its own.
Ascorbigen: dosing
There is no established standard dose for ascorbigen. It has not been studied enough in humans to know a safe and effective amount.If you choose to use a product that contains ascorbigen, follow the directions on the label and do not exceed the recommended amount.
From our Ascorbigen monograph — the full record covers uses, side effects and every documented interaction.
About Pembrolizumab Injection
What Is Pembrolizumab Injection Used For?
Brand name: Keytruda
Pembrolizumab is used to treat a wide range of cancers — including melanoma (skin cancer), lung cancer, head and neck cancers, bladder cancer, certain colorectal cancers, cervical cancer, kidney cancer, liver cancer, and many others. It can be used alone or combined with chemotherapy, depending on the cancer type and stage.
For some cancers, it's given before surgery (neoadjuvant), after surgery (adjuvant), or both — to help shrink tumors or reduce the chance the cancer comes back. Some uses require a lab test to confirm your tumor has certain markers (like PD-L1 expression) before starting treatment.
Most-Reported Side Effects for Pembrolizumab
From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Ascorbigen
Browse every other medication we’ve checked against Ascorbigen — 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 Ascorbigen against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Warfarin ›
- Methylphenidate ›
- Abemaciclib ›
- Sertraline ›
- Testosterone ›
- Ivermectin ›
- Acetaminophen ›
- Losartan Potassium ›
- Aspirin ›
- Rosuvastatin ›
- Metoprolol ›
- Clopidogrel ›
- Escitalopram ›
- Rivaroxaban ›
- Atorvastatin ›
- Docusate ›
- Ibuprofen ›
- Tirzepatide ›
- Methamphetamine ›
- Warfarin Sodium ›
- Tadalafil ›
- Valacyclovir ›
- Sumatriptan ›
- Hydroxyurea ›
- Semaglutide ›
- Prednisone ›
- Metformin ›
- Amitriptyline ›
- Propranolol ›
- Lisdexamfetamine ›
- Amoxicillin ›
- Isotretinoin ›
- Methotrexate ›
- Lisinopril ›
- Amlodipine Besylate ›
- Amphetamine ›
- Bendamustine ›
- Bupropion ›
- Fluoxetine ›
- Doxycycline ›
- Azithromycin ›
- Pregabalin ›
- Acyclovir ›
- Lamotrigine ›
- Gabapentin ›
- Dextroamphetamine ›
- Levothyroxine, Liothyronine ›
- Acetaminophen, Codeine ›
- Naproxen ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Letrozole ›
- Duloxetine ›
- Methylene Blue ›
- Citalopram ›
- Buspirone ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Ascorbigen list.
Ascorbigen References
The 1 references that drive our Ascorbigen monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.
- Bramwell B, Ferguson S, Scarlett N, Macintosh A. The use of ascorbigen in the treatment of fibromyalgia patients: a preliminary trial. Altern Med Rev 2000;5:455-62.
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 Ascorbigen and Pembrolizumab Together: Common Questions
Is it safe to take Ascorbigen with Pembrolizumab?
Are Ascorbigen and Pembrolizumab used for the same thing?
Does Pembrolizumab interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Pembrolizumab and Ascorbigen?
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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.