Medication interaction hub

What Supplements Interact with Osilodrostat Phosphate?

Osilodrostat Phosphate brand name: Isturisa. Every interaction below applies to the brands too.

148 Interactions 8 Major 101 Moderate 39 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Osilodrostat Phosphate? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Osilodrostat Phosphate against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

If you take osilodrostat phosphate (Isturisa) to bring cortisol down in Cushing's disease, choose your supplements with real care, because eight of the 148 ingredients on file carry a major rating. The bulk of the list, 121 ingredients, touches the CYP3A4 enzyme that clears this drug, so grapefruit can push its level up while St. John's wort can drain it enough to undo your cortisol control. A smaller group of 13 can stretch the heart's QT interval, a rhythm risk this medication already carries on its own.

Activated charcoal earns a major rating too, since it can soak up medication in the gut, so keep it and similar absorbers well apart from your dose. Most of what remains sits at moderate, 101 entries, with 39 minor. With cortisol control and heart rhythm both at stake, look up any capsule or powder below before pairing it with Isturisa.

— , Clinical Pharmacist · July 18, 2026

Major 8 Moderate 101 Minor 39 No known interaction 1,304

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Osilodrostat Phosphate: Top Interactions at a Glance

The most significant Osilodrostat Phosphate supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 148 interacting ingredients — plus 1,304 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Osilodrostat Phosphate + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Likely Grapefruit + Osilodrostat Phosphatei

Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Read the full interaction Major Likelihood Probable Activated Charcoal + Osilodrostat Phosphatei

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable Arsenic + Osilodrostat Phosphatei

Arsenic trioxide can prolong the QT interval.

Read the full interaction Major Likelihood Probable Cesium + Osilodrostat Phosphatei

Theoretically, taking cesium concomitantly with other drugs that prolong the QT interval may increase the risk of ventricular arrhythmias and death.

Read the full interaction Major Likelihood Probable Ephedra + Osilodrostat Phosphatei

Theoretically, ephedra might have an additive effect with drugs that prolong the QT interval.

Read the full interaction Major Likelihood Probable Sida Cordifolia + Osilodrostat Phosphatei

Theoretically, Sida cordifolia might increase the risk of additive QT interval prolongation when taken with QT interval-prolonging drugs.

Read the full interaction
The complete list

Every Supplement Checked Against Osilodrostat Phosphate

All 1,452 ingredients in our database, ranked by severity — 148 with a Osilodrostat Phosphate interaction on file and 1,304 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Osilodrostat Phosphate?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Terminalia with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, use of Terminalia arjuna may increase the levels and clinical effects of CYP3A4 substrates.

Full Terminalia + Osilodrostat Phosphate answer

Can you take Thunder God Vine with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, thunder god vine might increase the levels and clinical effects of CYP3A4 substrates.

Full Thunder God Vine + Osilodrostat Phosphate answer

Can you take Tragacanth with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, tragacanth might alter absorption of oral drugs.

Full Tragacanth + Osilodrostat Phosphate answer

Can you take Turmeric with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Turmeric might increase or decrease levels of drugs metabolized by CYP3A4.

Full Turmeric + Osilodrostat Phosphate answer

Can you take Uva Ursi with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, uva ursi may decrease the metabolism of CYP3A4 substrates.

Full Uva Ursi + Osilodrostat Phosphate answer

Can you take Vitamin E with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, vitamin E might induce metabolism of CYP3A4, possibly reducing the levels CYP3A4 substrates.

Full Vitamin E + Osilodrostat Phosphate answer

Can you take White Pepper with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. In vitro evidence suggests that piperine, a constituent of white pepper, inhibits cytochrome P450 3A4 (CYP3A4).

Full White Pepper + Osilodrostat Phosphate answer

Can you take Wild Cherry with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. In vitro research suggests that wild cherry can inhibit cytochrome P450 3A4 (CYP3A4) enzymes.

Full Wild Cherry + Osilodrostat Phosphate answer

Can you take Zedoary with Osilodrostat Phosphate?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, zedoary might increase levels of drugs metabolized by CYP3A4.

Full Zedoary + Osilodrostat Phosphate answer

Can you take Thyroid Extract with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Food and medications can interfere with thyroid hormone absorption.

Full Thyroid Extract + Osilodrostat Phosphate answer

Can you take Aegeline with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Aegeline inhibits cytochrome P450 3A4 (CYP3A4) activity in vitro.

Full Aegeline + Osilodrostat Phosphate answer

Can you take Agar with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Agar forms a thick gel, which may disrupt the absorption of nutrients and medications.

Full Agar + Osilodrostat Phosphate answer

Can you take Algin with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, algin can alter the absorption of oral drugs.

Full Algin + Osilodrostat Phosphate answer

Can you take Ashwagandha with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, ashwagandha might decrease the levels and clinical effects of CYP3A4 substrates.

Full Ashwagandha + Osilodrostat Phosphate answer

Can you take Atractylodes with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, atractylodes might increase the levels of CYP3A4 substrates.

Full Atractylodes + Osilodrostat Phosphate answer

Can you take Bael with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Bael and its constituents marmelosin and marmesinin inhibited cytochrome P450 3A4 (CYP3A4) activity in vitro.

Full Bael + Osilodrostat Phosphate answer

Can you take Black Psyllium with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Black Psyllium + Osilodrostat Phosphate answer

Can you take Blond Psyllium with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Blond Psyllium + Osilodrostat Phosphate answer

Can you take Breadfruit with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, breadfruit might inhibit cytochrome P450 3A4 (CYP3A4) and increase levels of drugs metabolized by these enzymes; until more i...

Full Breadfruit + Osilodrostat Phosphate answer

Can you take Carob with Osilodrostat Phosphate?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, carob might also impair the absorption of oral drugs.

Full Carob + Osilodrostat Phosphate answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction 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.
  • Possible. Interaction 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
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Osilodrostat Phosphate is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Osilodrostat Phosphate, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Osilodrostat Phosphate sits in 4 interaction categories. Open any one to see what the group means:

Cytochrome P450 3A4 (Cyp3A4) Substrates 121 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

121 of the supplement ingredients on this page reach Osilodrostat Phosphate through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Osilodrostat Phosphate through this category.

Cytochrome P450 2B6 (Cyp2B6) Substrates 15 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

15 of the supplement ingredients on this page reach Osilodrostat Phosphate through this category.

Qt Interval-Prolonging Drugs 13 ingredients

Medications that can affect the heart's electrical rhythm (the QT interval). Supplements with similar effects can add to that risk.

13 of the supplement ingredients on this page reach Osilodrostat Phosphate through this category.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Osilodrostat Phosphate

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Osilodrostat Phosphate.

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Pharmacist Counseling Corner

Osilodrostat Phosphate & Supplements: Common Questions

What supplements interact with Osilodrostat Phosphate?
Our database currently documents 148 ingredients with a known Osilodrostat Phosphate interaction (8 major, 101 moderate, 39 minor). The practical move: scan the major group first, then look up the exact supplements you take rather than reading all 148. The highest-ranked right now: Grapefruit, Activated Charcoal, Arsenic.
Which Osilodrostat Phosphate supplement interactions are the most serious?
The 8 major-rated combinations — led by Grapefruit, Activated Charcoal, Arsenic, Cesium and Ephedra — deserve real caution: these are the ones generally best avoided, or used only with your prescriber watching. If you take any of them today, don't panic and don't stop anything abruptly — call your pharmacist first. Jump to the ranked list.
Can I take vitamins or supplements while on Osilodrostat Phosphate?
Plenty of supplements coexist fine with Osilodrostat Phosphate; a shorter list does not. Rather than memorizing it, check the specific ingredients on your labels — the ranked list above covers every one we've checked, and multi-ingredient products can be checked label-by-label with our scanner. Try the label scanner or the interaction checker.
Do brands like Isturisa have the same supplement interactions as Osilodrostat Phosphate?
Yes — Isturisa all contain Osilodrostat Phosphate, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Osilodrostat Phosphate and my other medications?
This page covers Osilodrostat Phosphate against supplements and herbal ingredients. Checking Osilodrostat Phosphate against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker.

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

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 22, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.