Phosphate Salts + Futibatinib
Futibatinib brand name: Lytgobi.
Phosphate Salts has a major interaction with Futibatinib. Taking futibatinib with phosphate salts increases the risk of hyperphosphatemia.
Read the full interaction reportPhosphate Salts and Futibatinib
Here is the interaction we found between these two, with the evidence behind it.
FUTIBATINIB (Lytgobi)
Futibatinib can cause hyperphosphatemia, as reported in 88% of patients in clinical studies. In addition, 77% of patients in clinical studies required use of a phosphate binder to manage hyperphosphatemia. Phosphate salts should generally be avoided by people taking this medication.
Well-controlled human studies have demonstrated the likely existence of this interaction.
Here's the key thing with Lytgobi (futibatinib): this cancer medicine already pushes your phosphate levels up on its own. In studies, nearly 9 out of 10 people developed high phosphate (called hyperphosphatemia), and most actually needed a phosphate binder to bring it back down. So your care team is usually working hard to lower phosphate, not add more.
That's why taking a phosphate salt supplement on top of it is generally a bad mix. You'd be adding fuel to a fire. Too much phosphate over time can lead to mineral deposits, itching, muscle or bone problems, and kidney strain. Please don't start any phosphate product without checking first. Your oncology pharmacist or doctor can tell you what's safe and may already have a plan to monitor your levels.
- Product information for Lytgobi. Taiho Pharmaceutical Co., Japan. September 2022.
What These Ratings Mean
Every interaction above is graded three ways — here’s the key to each label.
Clinically significant. Avoid the combination, or use only under close professional supervision.
Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.
Generally not serious. Be aware of it and mention it to your pharmacist.
- LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
- ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
- PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
- UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
- AHigh-quality meta-analysis (quantitative systematic review).
- BCase-control study.
- CConsensus.
- DAnecdotal evidence.
These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.
Phosphate Salts Also Interacts With Other Medications
Phosphate Salts has 1 major, 10 moderate known drug interactions in our database — the Futibatinib one above is one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Phosphate Salts
We haven’t checked that one against Phosphate Salts yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Phosphate Salts. Pick one to open its full report.
See Every Supplement That Interacts With Futibatinib
This page covers Phosphate Salts only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Futibatinib page lists 145 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).
By severity: 4 major · 103 moderate · 38 minor.
From our pharmacist’s overview on the Futibatinib page
“Futibatinib (Lytgobi) is a targeted therapy for bile duct cancer, and people in the middle of cancer treatment often reach for supplements to feel better. With this drug, the safest habit is to check every one before it goes in the cart.”
Reviewed by 2 · Jul 18, 2026
Taking Phosphate Salts as Part of a Dietary Supplement Product? Check It for Interactions
We hold 6 real supplement products containing Phosphate Salts, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Phosphate Salts. Your product may carry other ingredients that interact with Futibatinib too, on top of Phosphate Salts — and those would not show on this page. Find your product and we’ll check every ingredient on its label:
Where Phosphate Salts and Futibatinib 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.
#1,103 of 1,452 supplements looked up here in the last 7 days
#470 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.
About Phosphate Salts
What is Phosphate Salts?
- Low blood phosphate levels (hypophosphatemia)
- Bowel preparation/laxative use
- Athletic performance ('phosphate loading')
- Preventing certain kidney stones
- Calcium supplementation balance
Phosphate salts are mineral compounds used mainly to correct low phosphate levels, as laxatives, and sometimes by athletes. Most people who eat a normal diet already get plenty of phosphate and do not need a supplement. Because too much phosphate can be dangerous—especially for people with kidney disease—use these products only under the guidance of a doctor or pharmacist.
About Futibatinib
What Is Futibatinib Used For?
Brand name: Lytgobi
Lytgobi (futibatinib) is used to treat adults with intrahepatic cholangiocarcinoma — a cancer that starts inside the bile ducts within the liver — that cannot be surgically removed and has spread locally or to other parts of the body. It is specifically for patients whose cancer has a gene change called an FGFR2 fusion or rearrangement, confirmed by testing, and who have already received prior treatment.
This approval is based on how many patients' tumors responded to Lytgobi and how long those responses lasted. Final confirmation of long-term benefit is still being studied in follow-up clinical trials.
Other Drugs & Phosphate Salts
Browse every other medication we’ve checked against Phosphate Salts — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
1 interaction
10 interactions
No interaction 2,818 drugs checked — show the list
We also checked Phosphate Salts 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 ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Acetaminophen ›
- Tadalafil ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Valacyclovir ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Warfarin Sodium ›
- Tirzepatide ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Acyclovir ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Methotrexate ›
- Fluoxetine ›
- Lamotrigine ›
- Acetaminophen, Codeine ›
- Amphetamine ›
- Gabapentin ›
- Pregabalin ›
- Dextroamphetamine ›
- Azithromycin ›
- Isotretinoin ›
- Clonazepam ›
- Omeprazole ›
- Methylene Blue ›
- Quetiapine ›
- Amlodipine Besylate ›
- Duloxetine ›
- Letrozole ›
- Buspirone ›
- Citalopram ›
- Naproxen ›
- Ciprofloxacin ›
Showing the 60 most looked-up of 2,818 medications checked with no known interaction — see the full Phosphate Salts list.
Sources & How We Checked
Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.
- 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 Phosphate Salts and Futibatinib Together: Common Questions
Can you take Phosphate Salts with Futibatinib?
How serious is the Phosphate Salts and Futibatinib interaction?
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