Drug & supplement interaction

Agar + tislelizumab-jsgr

tislelizumab-jsgr brand name: Tevimbra.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Agar and tislelizumab-jsgr 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.

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Interaction report

Agar and tislelizumab-jsgr

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 tislelizumab-jsgr and Agar 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.

Agar safety at a glance

Agar overall Use caution Generally safe as a food, but supplement doses should be taken with plenty of water to avoid blockage.
Pregnancy Use caution Likely fine in normal food amounts, but avoid concentrated supplement doses unless your doctor approves.
Breastfeeding Use caution Food amounts are likely fine, but there is little safety data on supplement doses.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining tislelizumab-jsgr and Agar? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for tislelizumab-jsgr

Interactions in our licensed database are recorded against drug classes, not just single drug names. tislelizumab-jsgr is filed under 2 classifications — nephrotoxic drugs, hepatotoxic drugs. Agar has documented interactions with 1 drug class — the most serious being oral drugs (minor) — and none of tislelizumab-jsgr’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.

Keep it in perspective

Agar Does Interact With Other Medications

Agar has 2,022 minor known drug interactions in our database — tislelizumab-jsgr isn’t one of them. If you take anything else, check it against the full list below.

Minor 2,022 No known interaction 808 (incl. tislelizumab-jsgr)
Taking anything else?

Check Another of Your Medications Against Agar

Covers the 2,830 medications we’ve checked against Agar. Pick one to open its full report.

What to actually watch for

What Agar Itself Has Been Linked To

This is not an interaction — nothing below involves tislelizumab-jsgr. It is the side-effect record for Agar on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Agar, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • A bowel blockage Worth acting on Additional detail

    “Orally, no adverse effects have been reported; however, a thorough evaluation of safety outcomes has not been conducted. Rarely, phytobezoars and esophageal or bowel obstruction have been reported after ingestion of high-fiber foods, such as agar (12,30500).”

    Agar · Natural Medicines adverse-effect record, reported in bowel obstruction.

    2 sources cited
    1. 12. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
    2. 30500. Osada, T., Shibuya, T., Kodani, T., Beppu, K., Sakamoto, N., Nagahara, A., Ohkusa, T., Ogihara, T., and Watanabe, S. Obstructing small bowel bezoars due to an agar diet: diagnosis using double balloon enteroscopy. Intern.Med 2008;47(7):617-620. PubMed

    “Orally, phytobezoars, which are concentrations of fruit and vegetable fibers in the gastrointestinal tract, have been rarely reported following ingestion of high-fiber foods, such as agar. Esophageal or bowel obstruction has also been reported when agar is consumed without sufficient fluid intake (12).”

    Agar · Natural Medicines adverse-effect record, reported in bowel obstruction.

    2 sources cited
    1. 30500. Osada, T., Shibuya, T., Kodani, T., Beppu, K., Sakamoto, N., Nagahara, A., Ohkusa, T., Ogihara, T., and Watanabe, S. Obstructing small bowel bezoars due to an agar diet: diagnosis using double balloon enteroscopy. Intern.Med 2008;47(7):617-620. PubMed
    2. 12. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.

Everything above comes from the Natural Medicines adverse-effect record for Agar — expand a row for the licensed statement it rests on. We haven’t matched tislelizumab-jsgr to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for tislelizumab-jsgr.

Everything else you take

See Every Supplement That Interacts With tislelizumab-jsgr

This page covers Agar only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the tislelizumab-jsgr page lists 42 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Asarabacca (major), Beer (major), Siberian Cocklebur (major), Wine (major) and Aristolochia (moderate).

By severity: 4 major · 37 moderate · 1 minor.

From our pharmacist’s overview on the tislelizumab-jsgr page

“Alcohol, even ordinary beer and wine, sits at the top of my concerns for anyone receiving tislelizumab-jsgr (Tevimbra), an immunotherapy for certain cancers of the esophagus and stomach. Drugs in this class can provoke immune attacks on the liver, and 38 of the 42 supplement ingredients on this page add liver stress of their own, so ne…”

Reviewed by 2 · Jul 18, 2026

Open the tislelizumab-jsgr interaction page

One more smart check

Taking Agar as Part of a Dietary Supplement Product? Check It for Interactions

We hold 23 real supplement products containing Agar, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Agar. Even though Agar itself has no known interaction with tislelizumab-jsgr, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Agar and tislelizumab-jsgr 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.

Supplement Agar
Top half

#648 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication tislelizumab-jsgr
Steady interest

#2,672 of 2,830 medications looked up here in the last 7 days

29 days ago today

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 Agar reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Agar and tislelizumab-jsgr 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.
Data structure & sourcing designed and verified by .
Supplement

About Agar

What is Agar?

Agar
  • Constipation
  • Weight loss
  • Vegetarian gelatin substitute
  • Source of dietary fiber
  • Appetite control

Agar is a plant-based gel made from red seaweed that is widely used as a vegetarian alternative to gelatin and as a source of dietary fiber. It is sometimes taken as a bulk-forming laxative or weight-loss aid, but solid human evidence for these health uses is limited. It is generally considered safe as a food, but you should drink plenty of water with it and check with your pharmacist before using it as a supplement.

Cell wall extract of red algae (seaweed) · Powder, flakes, bars, capsules, food-grade gel

An interaction check asks whether these two react with each other — it does not ask whether Agar is a good idea for someone in your situation. Here is what our Agar record says about it on its own.

Agar: dosing

There is no official, well-established medical dose of agar. The amount used in cooking depends on the recipe, and supplement products vary widely.If you use an agar supplement, follow the directions on the product label and take it with plenty of water.

From our Agar monograph — the full record covers uses, side effects and every documented interaction.

Read the full Agar monograph & all interactions
Keep checking

Other Drugs & Agar

Browse every other medication we’ve checked against Agar — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
2,022Minor
807No known interaction
2,022 Minor 807 No interaction
Minor

2,022 interactions

Showing 60 of 2,022 minor interactions — see all 2,022 on the Agar page.

No interaction 807 drugs checked — show the list

We also checked Agar against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 807 medications checked with no known interaction — see the full Agar list.

See the full Agar interactions page
See every supplement checked against tislelizumab-jsgr, ranked by severity
Evidence & sources

Agar References

The 13 references that drive our Agar 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.

  1. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  3. Kondo H, Osada A. Influence of dietary fiber on the bioavailability of zinc in rats. Biomed Environ Sci. 1996 Sept;9(2-3):204-8.
  4. Romagnoli, C., Polidori, G., Foschini, M., Cataldi, L., De, Turris P., Tortorolo, G., and Mastrangelo, R. Agar in the management of hyperbilirubinaemia in the premature baby. Arch.Dis.Child 1975;50(3):202-204. PubMed
  5. Windorfer, A., Jr., Kunzer, W., Bolze, H., Ascher, K., Wilcken, F., and Hoehne, K. Studies on the effect of orally administered agar on the serum bilirubin level of premature infants and mature newborns. Acta Paediatr.Scand. 1975;64(5):699-702. PubMed
  6. Maeda, H., Yamamoto, R., Hirao, K., and Tochikubo, O. Effects of agar (kanten) diet on obese patients with impaired glucose tolerance and type 2 diabetes. Diabetes Obes.Metab 2005;7(1):40-46.
  7. Osada, T., Shibuya, T., Kodani, T., Beppu, K., Sakamoto, N., Nagahara, A., Ohkusa, T., Ogihara, T., and Watanabe, S. Obstructing small bowel bezoars due to an agar diet: diagnosis using double balloon enteroscopy. Intern.Med 2008;47(7):617-620. PubMed
  8. Kemper, K., Horwitz, R. I., and McCarthy, P. Decreased neonatal serum bilirubin with plain agar: a meta-analysis. Pediatrics 1988;82(4):631-638. DOI
  9. Meloni, T., Costa, S., Corti, R., and Cutillo, S. Agar in control of hyperbilirubinemia of full-term newborn infants with erythrocyte G-6-PD deficiency. Biol.Neonate 1978;34(5-6):295-298. PubMed
  10. Maurer, H. M., Shumway, C. N., Draper, D. A., and Hossaini, A. A. Controlled trial comparing agar, intermittent phototherapy, and continuous phototherapy for reducing neonatal hyperbilirubinemia. J Pediatr. 1973;82(1):73-76.
  11. Caglayan, S., Candemir, H., Aksit, S., Kansoy, S., Asik, S., and Yaprak, I. Superiority of oral agar and phototherapy combination in the treatment of neonatal hyperbilirubinemia. Pediatrics 1993;92(1):86-89. DOI
  12. Harmuth-Hoene, A. E. and Schelenz, R. Effect of dietary fiber on mineral absorption in growing rats. J Nutr 1980;110(9):1774-1784. PubMed
  13. Abdel-Aziz Ali SMA, Mansour Galal S, Sror SM, Hussein O, Abd-El-Haseeb Ahmed AO, Hamed EA. Efficacy of oral agar in management of indirect hyperbilirubinemia in full-term neonates. J Matern Fetal Neonatal Med. 2020:1-6. PubMed

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.

Pharmacist Counseling Corner

Taking Agar and tislelizumab-jsgr Together: Common Questions

Is it safe to take Agar with tislelizumab-jsgr?
We do not list a known interaction between Agar and tislelizumab-jsgr. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
How was the Agar and tislelizumab-jsgr combination checked?
Interactions in our licensed database are recorded against drug classes. tislelizumab-jsgr is filed under 2 classifications, and Agar has documented interactions with 1 drug class — none of tislelizumab-jsgr's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Agar interact with any other medications?
Yes. Agar has 2,022 documented drug interactions in our database — tislelizumab-jsgr is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does tislelizumab-jsgr interact with any supplements?
Yes. tislelizumab-jsgr has documented interactions with 42 supplements in our database — Agar is not one of them. The tislelizumab-jsgr interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Agar monograph Uses, safety profile, and every drug interaction in one place tislelizumab-jsgr supplement interactions Every supplement checked against tislelizumab-jsgr, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 13 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

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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.