Medication interaction hub

What Supplements Interact with Phensuximide?

Phensuximide brand name: Milontin. Every interaction below applies to the brands too.

105 Interactions 7 Major 82 Moderate 16 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 Phensuximide? 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 Phensuximide 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.

Phensuximide (Milontin) treats absence seizures and is sedating on its own, which is why this supplement list earns real caution rather than a quick skim. Most of the risk is sedation stacking, since 78 of the 105 ingredients on file have calming effects of their own, and the heaviest combinations can push drowsiness toward dangerous suppression of breathing. Alcohol and kava sit among the seven rated major, alcohol backed by solid human evidence.

A smaller group of 17 works differently, changing how much of an oral dose actually reaches you. Activated charcoal is the major entry there; it can bind the medicine in the gut, and for a seizure drug that means weakened protection. Fifteen more herbs carry anticonvulsant activity themselves, none worse than moderate. Of the rest, 82 rate moderate and 16 minor, but the seven majors are where the danger concentrates, so start there.

— , Clinical Pharmacist · July 18, 2026

Major 7 Moderate 82 Minor 16 No known interaction 1,347

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

Phensuximide: Top Interactions at a Glance

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

Showing the 12 highest-ranked of 105 interacting ingredients — plus 1,347 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

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

Major Likelihood Likely Beer + Phensuximidei

Concomitant use may increase sedative and other adverse effects.

Read the full interaction Major Likelihood Likely Wine + Phensuximidei

Concomitant use may increase sedative and other adverse effects.

Read the full interaction Major Likelihood Probable 1,4-butanediol + Phensuximidei

Theoretically, concomitant use of 1,4-butanediol with CNS depressants may potentiate respiratory and CNS depression.

Read the full interaction Major Likelihood Probable Activated Charcoal + Phensuximidei

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 Gamma-hydroxybutyrate (ghb) + Phensuximidei

GHB may increase the risk of serious CNS and respiratory depression.

Read the full interaction Major Likelihood Probable Kava + Phensuximidei

Combining kava with CNS depressants can have additive sedative effects.

Read the full interaction
The complete list

Every Supplement Checked Against Phensuximide

All 1,452 ingredients in our database, ranked by severity — 105 with a Phensuximide interaction on file and 1,347 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 Phensuximide?

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 Andiroba with Phensuximide?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Andiroba contains fatty acid amides that have shown potential anticonvulsant effects in animal studies.

Full Andiroba + Phensuximide answer

Can you take Gamma-hydroxybutyrate (ghb) with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. GHB may increase the risk of serious CNS and respiratory depression.

Full Gamma-hydroxybutyrate (ghb) + Phensuximide answer

Can you take Yerba Mansa with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might cause additive or prolonged sedative effects.

Full Yerba Mansa + Phensuximide answer

Can you take Beer with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use may increase sedative and other adverse effects.

Full Beer + Phensuximide answer

Can you take Wine with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use may increase sedative and other adverse effects.

Full Wine + Phensuximide answer

Can you take 1,4-butanediol with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, concomitant use of 1,4-butanediol with CNS depressants may potentiate respiratory and CNS depression.

Full 1,4-butanediol + Phensuximide answer

Can you take Activated Charcoal with Phensuximide?

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 + Phensuximide answer

Can you take Kava with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Combining kava with CNS depressants can have additive sedative effects.

Full Kava + Phensuximide answer

Can you take L-tryptophan with Phensuximide?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.

Full L-tryptophan + Phensuximide answer

Can you take Coffee Charcoal with Phensuximide?

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 + Phensuximide answer

Can you take European Mandrake with Phensuximide?

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 + Phensuximide answer

Can you take Glucomannan with Phensuximide?

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 + Phensuximide answer

Can you take 5-htp with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use of 5-HTP with medications that cause sedation might have additive effects.

Full 5-htp + Phensuximide answer

Can you take Adrue with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Animal research suggests that taking adrue in combination with sodium thiopental or diazepam increases total sleep time up to four-fold comp...

Full Adrue + Phensuximide answer

Can you take Albizia Julibrissin with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Animal research suggests that certain constituents from Albizia julibrissin flowers can potentiate pentobarbital-induced sleeping time in mi...

Full Albizia Julibrissin + Phensuximide answer

Can you take Ashwagandha with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking ashwagandha might increase the sedative effects of CNS depressants.

Full Ashwagandha + Phensuximide answer

Can you take Bay Leaf with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking bay leaf in large amounts may enhance the therapeutic and adverse effects of sedatives.

Full Bay Leaf + Phensuximide answer

Can you take Berberine with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, berberine might increase the sedative effects of CNS depressants.

Full Berberine + Phensuximide answer

Can you take Bitter Almond with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, bitter almond oil may have additive effects with other CNS depressants.

Full Bitter Almond + Phensuximide answer

Can you take Black Seed with Phensuximide?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.

Full Black Seed + Phensuximide 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) Phensuximide is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Phensuximide, 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.

Phensuximide sits in 3 interaction categories. Open any one to see what the group means:

Cns Depressants 78 ingredients

Central-nervous-system depressants. Sedating supplements can intensify drowsiness and slowed reactions when combined.

78 of the supplement ingredients on this page reach Phensuximide 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 Phensuximide through this category.

Anticonvulsants 15 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.

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

Related: does Phensuximide deplete any nutrients?

Phensuximide has 1 reported nutrient association in the research literature — see the Phensuximide nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Phensuximide

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 Phensuximide.

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Pharmacist Counseling Corner

Phensuximide & Supplements: Common Questions

What supplements interact with Phensuximide?
In our interaction database, 105 supplement and herbal ingredients have an interaction with Phensuximide on file — 7 rated major, 82 moderate, and 16 minor. That number sounds scarier than it is: severity matters far more than the count, which is why the list on this page is ranked instead of alphabetical. Start at the top. The highest-ranked right now: Beer, Wine, 1,4-butanediol.
Which Phensuximide supplement interactions are the most serious?
Focus on the major group: Beer, Wine, 1,4-butanediol, Activated Charcoal and Gamma-hydroxybutyrate (ghb), among others. 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 Phensuximide?
That depends entirely on which supplement. The honest answer for Phensuximide is in the ranked list above — and if what you take is a combination product with a dozen ingredients, don't check them one by one: photograph the label with our scanner and we'll check the whole thing at once. Try the label scanner or the interaction checker.
Do brands like Milontin have the same supplement interactions as Phensuximide?
Yes — Milontin all contain Phensuximide, 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 Phensuximide deplete any vitamins or nutrients?
It might — Phensuximide has 1 reported nutrient-depletion association 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 Phensuximide nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Phensuximide and my other medications?
This page covers Phensuximide against supplements and herbal ingredients. Checking Phensuximide 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.