Medication interaction hub

What Supplements Interact with Phenazopyridine, Sulfamethizole?

Phenazopyridine, Sulfamethizole brand names: Thiosulfil-A, Thiosulfil-A Forte. Every interaction below applies to the brands too.

44 Interactions 1 Major 33 Moderate 10 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 Phenazopyridine, Sulfamethizole? 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 Phenazopyridine, Sulfamethizole 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.

Phenazopyridine with sulfamethizole (Thiosulfil-A) pairs a sulfa antibiotic with a urinary pain reliever, usually prescribed for a bladder infection, and this list deserves real attention, not a glance. The single major-rated interaction among the 44 ingredients on file is activated charcoal, which can bind the medication in the gut and sharply cut how much reaches your system, undermining both the infection treatment and the pain relief.

The rest of the list splits two ways. Twenty-seven entries involve the antibiotic side, chiefly probiotic organisms the sulfa drug can kill off, so taking them at the same time wastes the supplement. The other 17, charcoal included, can change how oral medicines are absorbed, with bulky fibers like glucomannan in that group. Alongside the one major rating, 33 entries sit at moderate and 10 at minor. Spacing supplements well apart from your doses takes care of much of that, but charcoal is the one to skip outright unless your prescriber approves it.

— , Clinical Pharmacist · July 18, 2026

Major 1 Moderate 33 Minor 10 No known interaction 1,408

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

Phenazopyridine, Sulfamethizole: Top Interactions at a Glance

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

Showing the 12 highest-ranked of 44 interacting ingredients — plus 1,408 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

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

Major Likelihood Probable Activated Charcoal + Phenazopyridine, Sulfamethizolei

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

Read the full interaction
The complete list

Every Supplement Checked Against Phenazopyridine, Sulfamethizole

All 1,452 ingredients in our database, ranked by severity — 44 with a Phenazopyridine, Sulfamethizole interaction on file and 1,408 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 Phenazopyridine, Sulfamethizole?

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 Activated Charcoal with Phenazopyridine, Sulfamethizole?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Phenazopyridine, Sulfamethizole answer

Can you take Bacillus Coagulans with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking antibiotics with Bacillus coagulans might decrease the effectiveness of B.

Full Bacillus Coagulans + Phenazopyridine, Sulfamethizole answer

Can you take Bacillus Subtilis with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bacillus subtilis with antibiotic drugs might decrease the effectiveness of B.

Full Bacillus Subtilis + Phenazopyridine, Sulfamethizole answer

Can you take Bifidobacterium Animalis Subsp. Lactis with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium lactis with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Animalis Subsp. Lactis + Phenazopyridine, Sulfamethizole answer

Can you take Bifidobacterium Bifidum with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium.

Full Bifidobacterium Bifidum + Phenazopyridine, Sulfamethizole answer

Can you take Bifidobacterium Breve with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium breve with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Breve + Phenazopyridine, Sulfamethizole answer

Can you take Bifidobacterium Longum with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Bifidobacterium longum with antibiotic drugs might decrease the effectiveness of B.

Full Bifidobacterium Longum + Phenazopyridine, Sulfamethizole answer

Can you take Coffee Charcoal with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Phenazopyridine, Sulfamethizole answer

Can you take European Mandrake with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Phenazopyridine, Sulfamethizole answer

Can you take Fermented Milk with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, antibiotic drugs might decrease the effectiveness of fermented milk.

Full Fermented Milk + Phenazopyridine, Sulfamethizole answer

Can you take Glucomannan with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Phenazopyridine, Sulfamethizole answer

Can you take Lacticaseibacillus Casei with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus casei with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Casei + Phenazopyridine, Sulfamethizole answer

Can you take Lacticaseibacillus Paracasei with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus paracasei with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Paracasei + Phenazopyridine, Sulfamethizole answer

Can you take Lacticaseibacillus Rhamnosus with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lacticaseibacillus rhamnosus with antibiotic drugs might decrease the effectiveness of L.

Full Lacticaseibacillus Rhamnosus + Phenazopyridine, Sulfamethizole answer

Can you take Lactiplantibacillus Pentosus with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactiplantibacillus pentosus with antibiotic drugs might decrease the effectiveness of L.

Full Lactiplantibacillus Pentosus + Phenazopyridine, Sulfamethizole answer

Can you take Lactiplantibacillus Plantarum with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactiplantibacillus plantarum with antibiotic drugs might decrease the effectiveness of L.

Full Lactiplantibacillus Plantarum + Phenazopyridine, Sulfamethizole answer

Can you take Lactobacillus Acidophilus with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L.

Full Lactobacillus Acidophilus + Phenazopyridine, Sulfamethizole answer

Can you take Lactobacillus Crispatus with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactobacillus crispatus with antibiotic drugs might decrease the effectiveness of L.

Full Lactobacillus Crispatus + Phenazopyridine, Sulfamethizole answer

Can you take Lactobacillus Delbrueckii with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactobacillus delbrueckii with antibiotic drugs might decrease the effectiveness of L.

Full Lactobacillus Delbrueckii + Phenazopyridine, Sulfamethizole answer

Can you take Lactobacillus Gasseri with Phenazopyridine, Sulfamethizole?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Lactobacillus gasseri with antibiotic drugs might decrease the effectiveness of L.

Full Lactobacillus Gasseri + Phenazopyridine, Sulfamethizole 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) Phenazopyridine, Sulfamethizole is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Phenazopyridine, Sulfamethizole, 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.

Phenazopyridine, Sulfamethizole sits in 2 interaction categories. Open any one to see what the group means:

Antibiotic Drugs 27 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.

27 of the supplement ingredients on this page reach Phenazopyridine, Sulfamethizole 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 Phenazopyridine, Sulfamethizole through this category.

Related: does Phenazopyridine, Sulfamethizole deplete any nutrients?

Phenazopyridine, Sulfamethizole has 14 reported nutrient associations in the research literature — see the Phenazopyridine, Sulfamethizole nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Phenazopyridine, Sulfamethizole

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 Phenazopyridine, Sulfamethizole.

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Pharmacist Counseling Corner

Phenazopyridine, Sulfamethizole & Supplements: Common Questions

What supplements interact with Phenazopyridine, Sulfamethizole?
Our database currently documents 44 ingredients with a known Phenazopyridine, Sulfamethizole interaction (1 major, 33 moderate, 10 minor). The practical move: scan the major group first, then look up the exact supplements you take rather than reading all 44. The highest-ranked right now: Activated Charcoal, Bacillus Coagulans, Bacillus Subtilis.
Which Phenazopyridine, Sulfamethizole supplement interactions are the most serious?
Focus on the major group: Activated Charcoal. A major rating means the combination can be clinically significant, not that harm is guaranteed — but it's exactly the kind of thing to run past your pharmacist before your next dose, not after. Jump to the ranked list.
Can I take vitamins or supplements while on Phenazopyridine, Sulfamethizole?
Plenty of supplements coexist fine with Phenazopyridine, Sulfamethizole; 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 Thiosulfil-A have the same supplement interactions as Phenazopyridine, Sulfamethizole?
Yes — Thiosulfil-A, Thiosulfil-A Forte all contain Phenazopyridine, Sulfamethizole, 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.
Does Phenazopyridine, Sulfamethizole deplete any vitamins or nutrients?
It might — Phenazopyridine, Sulfamethizole has 14 reported nutrient-depletion associations in the research literature, which is a different question from interactions: instead of a supplement changing the drug, the drug may lower a nutrient over time. See the Phenazopyridine, Sulfamethizole nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Phenazopyridine, Sulfamethizole and my other medications?
This page covers Phenazopyridine, Sulfamethizole against supplements and herbal ingredients. Checking Phenazopyridine, Sulfamethizole 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.