Medication interaction hub

What Supplements Interact with Lorcaserin?

Lorcaserin brand names: Belviq, Belviq XR. Every interaction below applies to the brands too.

40 Interactions 2 Major 27 Moderate 11 Minor
Curated & coded by · Clinical Pharmacist · Updated September 15, 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 Lorcaserin? 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 Lorcaserin 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.

Lorcaserin (Belviq) curbs appetite by stimulating serotonin receptors, which is exactly why I would slow down before pairing it with supplements. Half the entries below also push serotonin higher, and stacking them can edge toward serotonin syndrome, a dangerous serotonin overload. Lithium is the one to understand first, since it can both raise and hide that risk, and activated charcoal earns the other top rating because it can soak up the drug before your body absorbs it.

Most of the rest are fibers, gums, and charcoals that blunt absorption of anything swallowed, so keep them well separated from your dose. Three, yohimbe among them, may build up in the body because lorcaserin slows the enzyme that clears them. Those two charcoal and lithium pairings carry the only major ratings; the other 38 divide into 27 moderate and 11 minor, milder pairings but not trivial ones on a drug built around serotonin.

— , Clinical Pharmacist · July 18, 2026

Major 2 Moderate 27 Minor 11 No known interaction 1,412

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

Lorcaserin: Top Interactions at a Glance

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

Showing the 12 highest-ranked of 40 interacting ingredients — plus 1,412 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

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

Major Likelihood Probable Activated Charcoal + Lorcaserini

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 Lithium + Lorcaserini

Theoretically, taking lithium supplements with serotonergic drugs might both mask and increase the risk of serotonin syndrome.

Read the full interaction
The complete list

Every Supplement Checked Against Lorcaserin

All 1,452 ingredients in our database, ranked by severity — 40 with a Lorcaserin interaction on file and 1,412 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 Lorcaserin?

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 L-tryptophan with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, combining L-tryptophan with serotonergic drugs might cause additive serotonergic effects.

Full L-tryptophan + Lorcaserin answer

Can you take Methylene Blue with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Combining serotonergic drugs with methylene blue can cause additive serotonergic effects, including serotonin syndrome.

Full Methylene Blue + Lorcaserin answer

Can you take Phenethylamine (pea) with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, combining serotonergic drugs with phenethylamine might increase the risk of serotonergic adverse effects.

Full Phenethylamine (pea) + Lorcaserin answer

Can you take Psilocybin with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, combining psilocybin with serotonergic drugs might cause additive serotonergic effects.

Full Psilocybin + Lorcaserin answer

Can you take Same with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Taking SAMe with serotonergic drugs might increase the risk of serotonin syndrome and other serotonergic side effects.

Full Same + Lorcaserin answer

Can you take Slippery Elm with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, slippery elm may slow the absorption and reduce serum levels of oral drugs.

Full Slippery Elm + Lorcaserin answer

Can you take St. John's Wort with Lorcaserin?

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

Full St. John's Wort + Lorcaserin answer

Can you take Syrian Rue with Lorcaserin?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Syrian rue might increase the risk of serotonergic adverse effects, including serotonin syndrome, when taken with serotonergi...

Full Syrian Rue + Lorcaserin answer

Can you take Tragacanth with Lorcaserin?

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 + Lorcaserin answer

Can you take Thyroid Extract with Lorcaserin?

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 + Lorcaserin answer

Can you take Agar with Lorcaserin?

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 + Lorcaserin answer

Can you take Algin with Lorcaserin?

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 + Lorcaserin answer

Can you take Ashwagandha with Lorcaserin?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Some animal studies have reported that ashwagandha can enhance serotonergic transmission by altering certain serotonin (5-HT) receptors.

Full Ashwagandha + Lorcaserin answer

Can you take Black Psyllium with Lorcaserin?

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 + Lorcaserin answer

Can you take Blond Psyllium with Lorcaserin?

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 + Lorcaserin answer

Can you take Carob with Lorcaserin?

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 + Lorcaserin answer

Can you take Karaya Gum with Lorcaserin?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Co-administration of oral drugs with bulk forming laxatives such as karaya gum may decrease, increase, or have no effect on the absorption o...

Full Karaya Gum + Lorcaserin answer

Can you take Marshmallow with Lorcaserin?

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

Full Marshmallow + Lorcaserin answer

Can you take Xanthan Gum with Lorcaserin?

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

Full Xanthan Gum + Lorcaserin answer

Can you take Theanine with Lorcaserin?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting.

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

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

Serotonergic Drugs 20 ingredients

Medications that raise serotonin activity. Combining them with serotonin-active supplements can, in rare cases, push serotonin too high.

20 of the supplement ingredients on this page reach Lorcaserin 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 Lorcaserin through this category.

Cytochrome P450 2D6 (Cyp2D6) Inhibitors 3 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.

3 of the supplement ingredients on this page reach Lorcaserin through this category.

Serotonergic Drugs 1 ingredient

Medications that raise serotonin activity. Combining them with serotonin-active supplements can, in rare cases, push serotonin too high.

1 of the supplement ingredient on this page reaches Lorcaserin through this category.

About Lorcaserin

Lorcaserin is a prescription medication also sold under the brand names Belviq, Belviq XR. Because supplements and herbal products can change how medications work — or how strongly — every ingredient on this page has been checked against it in our interaction database.

Generic name: Lorcaserin  ·  Brand names: Belviq, Belviq XR.

See the full Lorcaserin drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Lorcaserin

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 Lorcaserin.

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Pharmacist Counseling Corner

Lorcaserin & Supplements: Common Questions

What supplements interact with Lorcaserin?
More than you might expect — 40 in total, though they are far from equal: 2 are rated major, 27 moderate, and 11 minor. The ranked list on this page puts the ones that genuinely matter first, and every entry opens a full report on that exact pair. The highest-ranked right now: Activated Charcoal, Lithium, Coffee Charcoal.
Which Lorcaserin supplement interactions are the most serious?
The 2 major-rated combinations — led by Activated Charcoal and Lithium — 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 Lorcaserin?
Usually yes — most people on Lorcaserin can take most supplements. The catch is the exceptions, and they aren't always the exotic ones (St. John's Wort trips up more prescriptions than almost anything sold next to it). Look up each ingredient you actually take in the list above, and treat "no known interaction" as a green-ish light, not a guarantee. Try the label scanner or the interaction checker.
Do brands like Belviq have the same supplement interactions as Lorcaserin?
Yes — Belviq, Belviq XR all contain Lorcaserin, 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 Lorcaserin and my other medications?
This page covers Lorcaserin against supplements and herbal ingredients. Checking Lorcaserin 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, or read the full Lorcaserin drug information.

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 15, 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.