FDA-filed SPL labeling · retrieved through openFDA

Tetrabenazine

Tetrabenazine is a prescription medication used to treat chorea (involuntary, jerky movements) associated with Huntington's disease, available as tablets under the brand name Xenazine and as generic tetrabenazine.

Brand name Xenazine
Drug class ⓘ Vesicular Monoamine Transporter 2 Inhibitor
Rx Form 1 Route Oral
Dr. Brian Staiger, PharmD, BCPS
Reviewed by Last reviewed Jul 10, 2026
🧬 Where this information comes from Click to expand

The clinical label records used on this page are FDA-filed Structured Product Labeling (SPL) retrieved through openFDA. We identified 12 clinical label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. Forms, routes, brands, labelers, strengths, and NDC product-record counts are built separately from matching FDA National Drug Code Directory records. The linked DailyMed document is a representative official source for verification, not the page’s only clinical source. View the linked label on DailyMed →

At a glance
Linked label effectiveNov 29, 2019
Clinical labels in scope ⓘ12
AvailabilityRx
Earliest approval/marketing year ⓘ2008
FDA-listed product records ⓘ56
Boxed warningYes
How we combine label and product data →
✓No current FDA shortage listed · checked Sep 20, 2026
⭐ Tetrabenazine at a glance The quick version — the full detail is in the Patient Information Guide below.
💊
HelloPharmacist Editorial Team Bottom Line
Tetrabenazine (Xenazine and generic) is the go-to oral tablet for reducing the involuntary, jerky movements of chorea in Huntington's disease, but it carries a serious risk of depression and suicidality that demands close monitoring throughout treatment. Dosing must be individualized carefully and adjusted based on how your body processes the drug. Work closely with your prescriber, and make sure your family and caregivers know what warning signs to watch for.
How we write & review this content — our editorial policy →
⚠️ FDA Boxed Warning — the FDA’s strongest safety alert ▾

Tetrabenazine can increase the risk of depression and suicidal thoughts or actions in people with Huntington's disease. This is the FDA's most serious type of warning. Anyone taking this medication — and their caregivers and family members — should watch carefully for signs of new or worsening depression, hopelessness, or any talk of suicide, and report these to the doctor right away. Tetrabenazine must not be used in anyone who is actively suicidal or who has depression that is untreated or not well controlled. People with Huntington's disease already have a higher chance of depression and suicidal thinking, so this risk requires extra attention throughout treatment.

Read the full warning on DailyMed →

📖 Tetrabenazine: Patient Information Guide

A plain-language walkthrough of Tetrabenazine — what it treats, how it works, how it’s taken, side effects, warnings and interactions. Tap any section to expand it.

🎯What it's used for▾

Tetrabenazine tablets are approved for one specific use: reducing chorea in Huntington's disease.

  • Xenazine (tetrabenazine) tablets — oral — are FDA-approved to treat chorea (involuntary, jerky, uncontrolled movements) associated with Huntington's disease
  • Generic tetrabenazine tablets — oral — carry the same approved indication for chorea associated with Huntington's disease
⚙️How it works▾

Tetrabenazine targets a protein in nerve cells called VMAT2 (vesicular monoamine transporter 2). This transporter normally packages chemical messengers — dopamine, serotonin, norepinephrine, and histamine — into tiny storage sacs inside nerve endings. By blocking VMAT2, tetrabenazine reduces how much of these chemicals are available to transmit signals between nerve cells. This reduction in dopamine activity in the brain is believed to be the key reason the drug calms involuntary movements, though the exact mechanism hasn't been fully confirmed.

Once absorbed, tetrabenazine is rapidly converted in the liver into active breakdown products (metabolites), primarily alpha-HTBZ and beta-HTBZ, which also inhibit VMAT2 and carry out much of the drug's effect in the body.

💊How it's taken▾

Tetrabenazine tablets are taken by mouth and can be swallowed with or without food. The dose is always started low and increased slowly — typically at weekly intervals — until chorea is adequately controlled or side effects require stopping the increase. At higher daily doses, tablets are usually divided into two or three doses throughout the day.

  • Patients needing higher daily doses must have a genetic test (CYP2D6 genotyping) first, since how your body breaks down the drug affects the safe upper limit
  • If bothersome side effects appear, the dose is reduced — and in some cases, the drug may need to be stopped

Always follow your prescriber's exact instructions. Do not adjust your dose on your own.

🤒Side effects — in detail▾

Side effects are common with tetrabenazine — most are dose-related and may improve if the dose is reduced.

  • Sedation or drowsiness (the most common reason doses are adjusted)
  • Insomnia
  • Fatigue
  • Depression or worsening depression
  • Akathisia (a distressing, restless urge to move)
  • Anxiety
  • Nausea
  • Parkinsonism — slowness, stiffness, or reduced movement
  • Dizziness or balance problems
  • Difficulty swallowing (dysphagia)

Depression and suicidal thinking are serious side effects that require immediate medical attention. Neuroleptic Malignant Syndrome — a rare, life-threatening reaction involving high fever, severe muscle rigidity, and confusion — is a medical emergency; stop the drug and seek help right away if this occurs.

⚠️Warnings & precautions▾
  • Depression and suicidality: Tetrabenazine significantly raises the risk of depression and suicidal thoughts in people with Huntington's disease. This is a boxed warning — the FDA's strongest alert. Monitor closely throughout treatment, and report any mood changes or suicidal talk to the doctor immediately.
  • Neuroleptic Malignant Syndrome (NMS): A rare but potentially fatal reaction involving high fever, muscle rigidity, altered mental status, and unstable heart rate or blood pressure. Discontinue tetrabenazine immediately if NMS is suspected.
  • Akathisia and parkinsonism: Restlessness, an uncontrollable urge to move, and Parkinson's-like stiffness or slowness can occur — dose reduction or stopping the drug may be needed.
  • Sedation: Tetrabenazine can make you very drowsy. Avoid driving or operating heavy machinery until you know how the drug affects you.
  • QTc prolongation: The drug slightly lengthens a heart rhythm measurement (QTc interval), which can raise the risk of a dangerous irregular heartbeat. Avoid combining it with other drugs that also affect QTc.
  • Low blood pressure: Dizziness when standing (orthostatic hypotension) can occur — rise slowly from sitting or lying positions.
  • Elevated prolactin: Tetrabenazine raises levels of the hormone prolactin, which may matter for patients with a history of breast cancer.
  • Eye and skin binding: The drug and its metabolites accumulate in pigmented tissues like the eye; long-term effects on vision are not yet fully known.
🔀What it interacts with▾

Tetrabenazine has several important drug interactions — some are contraindicated (meaning they must never be combined).

  • MAOIs (e.g., phenelzine, selegiline): Absolutely contraindicated — must not be used together; wait at least 14 days after stopping an MAOI before starting tetrabenazine
  • Reserpine: Contraindicated — must not be combined; wait at least 20 days after stopping reserpine
  • Deutetrabenazine or valbenazine: Contraindicated — do not use at the same time as tetrabenazine
  • Strong CYP2D6 inhibitors (fluoxetine, paroxetine, quinidine): Significantly raise the blood levels of tetrabenazine's active metabolites, requiring a strict dose cap
  • Antipsychotics and dopamine-blocking drugs (haloperidol, chlorpromazine, risperidone, olanzapine, others): Increase the risk of movement side effects (parkinsonism, akathisia) and NMS, and may compound QTc prolongation
  • Other QTc-prolonging drugs (certain antibiotics, antiarrhythmics): Should be avoided alongside tetrabenazine to reduce heart rhythm risk
  • Alcohol and sedating medications: Add to drowsiness — use with extreme caution

This is not a complete list of interactions. Always talk with your doctor or pharmacist before starting, stopping, or changing any medication.

📋Before taking it▾
  • Do not take tetrabenazine if you are actively suicidal
  • Do not take it if you have untreated or inadequately treated depression
  • Do not take it if you have any degree of liver (hepatic) impairment — it is contraindicated
  • Tell your doctor about all medications, especially MAOIs, reserpine, deutetrabenazine, valbenazine, antidepressants, and antipsychotics
  • Tell your doctor if you have a personal or family history of depression or suicide attempts — Huntington's disease already raises this risk
  • Tell your doctor if you have a history of heart rhythm problems or congenital long QT syndrome
  • Tell your doctor if you have or have had breast cancer, since tetrabenazine raises prolactin (a hormone linked to breast tissue)
  • Pregnancy: Animal studies showed harm to developing offspring; tell your doctor if you are pregnant or planning to become pregnant — the risks and benefits must be carefully weighed
  • Breastfeeding: It is unknown whether tetrabenazine or its metabolites pass into human breast milk; discuss with your doctor
  • Children: Safety and effectiveness in pediatric patients have not been established
  • Older adults: The drug's pharmacokinetics have not been formally studied in elderly patients; use with appropriate monitoring
🚑If you take too much▾

Taking too much tetrabenazine can cause acute involuntary muscle contractions (dystonia), abnormal eye movements, nausea, vomiting, sweating, heavy sedation, low blood pressure, confusion, diarrhea, hallucinations, and tremor. If an overdose is suspected, seek emergency medical care immediately and monitor heart rhythm and vital signs. Contact a poison control center for guidance, and always consider that other drugs may have been involved.

📡Pharmacodynamics — effects in the body▾

Tetrabenazine causes a small but measurable lengthening of the QTc interval — a marker of heart electrical activity — of about 8 milliseconds at studied doses. This effect on heart rhythm is the reason the drug should not be combined with other medications that also prolong the QTc interval. The drug and its metabolites also bind to melanin-containing tissues, such as the eye and skin, and this accumulation over time may have effects that are not yet fully characterized.

🔬Pharmacokinetics — how your body processes it▾

After swallowing, tetrabenazine is well absorbed and quickly converted by the liver into two active metabolites — alpha-HTBZ and beta-HTBZ — which reach peak blood levels within about 1 to 1.5 hours. These metabolites are further broken down mainly by a liver enzyme called CYP2D6, which is why your genetic ability to use that enzyme affects how much drug accumulates in your body. The active metabolites have half-lives (the time it takes the body to clear half the drug) ranging from about 5 to 12 hours, and most of the drug is eventually eliminated through the urine. Food does not meaningfully affect how much of the drug is absorbed.

📦How to store it▾

Store at 20ºC to 25ºC (68ºF to 77ºF); excursions permitted from 15ºC to 30ºC (59ºF to 86ºF) .

📄 Written from Tetrabenazine’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Every point is grounded in that labeling — nothing is invented. How we use AI →

17

Supplements & herbs that interact with Tetrabenazine

17 supplements and herbal products have documented interactions with Tetrabenazine in the licensed clinical database we use. Most are manageable — but your pharmacist should know about everything you take, including vitamins and herbals.

Severity mix
  • Major · 1
  • Moderate · 7
  • Minor · 9
ACTIVATED CHARCOAL Major COFFEE CHARCOAL Moderate EUROPEAN MANDRAKE Moderate GLUCOMANNAN Moderate GUAR GUM Moderate GUM ARABIC Moderate SLIPPERY ELM Moderate TRAGACANTH Moderate +9 more
Every supplement checked against Tetrabenazine — ranked by severity The full interaction hub: 1 major · 7 moderate · 9 minor · every one linked to its full report. Check Tetrabenazine against your exact supplements

Educational information from a licensed clinical database (Natural Medicines) — see our data sources & update cadence. Not medical advice: an interaction being documented does not mean it will happen to you; do not start or stop medications or supplements without professional guidance.

🩺 Pharmacist Counseling Corner

Quick, plain-English answers to the questions patients ask most about Tetrabenazine — the kind of thing our pharmacy team would talk through with you at the counter.

What exactly does tetrabenazine do for Huntington's disease? ▾
Tetrabenazine doesn't treat the disease itself — it specifically targets the involuntary, jerky movements called chorea that are a major symptom of Huntington's disease. By reducing levels of certain chemical messengers in your brain, it helps calm those uncontrolled movements. Many patients find it significantly improves their ability to function day to day. Your doctor will adjust the dose over several weeks to find what works best for you.
I heard this medication can cause depression. How serious is that risk? ▾
It's a very real concern — serious enough that the FDA requires a boxed warning on the label. Tetrabenazine can increase the risk of depression and suicidal thoughts, especially since people with Huntington's disease are already more prone to both. You, your caregivers, and your family should all watch for signs of worsening mood, hopelessness, or any mention of suicide, and contact your doctor right away if these occur. Your doctor will weigh this risk against how much the medication helps with your chorea.
Can I take this medication with my other prescriptions? ▾
There are some very important interactions to know about. Tetrabenazine must never be combined with MAOIs (a type of antidepressant), reserpine, deutetrabenazine, or valbenazine — these combinations are contraindicated. Certain antidepressants like fluoxetine or paroxetine can raise tetrabenazine levels significantly and require a dose limit. Antipsychotics and many other medications can also interact. Please share your complete medication list with your prescriber and pharmacist before starting.
Will tetrabenazine make me too drowsy to drive? ▾
Drowsiness is the most common side effect and one of the main reasons doses sometimes need to be reduced. You should avoid driving or operating heavy machinery until you've been on a stable dose long enough to know how the medication affects you. Alcohol and other sedating medications will make drowsiness worse, so it's best to be very cautious with those. If drowsiness is severe, let your doctor know — lowering the dose often helps.
Can I take tetrabenazine if I'm pregnant or breastfeeding? ▾
This is something to discuss carefully with your doctor. Animal studies showed that tetrabenazine and one of its breakdown products caused harm to developing offspring, including increased fetal loss and effects on growth and behavior. There's no solid human data yet. Similarly, it's not known whether the drug passes into breast milk. Your doctor will help you weigh the potential risks against the benefits of treating your symptoms.
What should I do if I miss a dose? ▾
Follow the instructions your prescriber or pharmacist gave you. In general, take tetrabenazine on your regular schedule and don't double up to make up for a missed dose. If you're unsure what to do, call your pharmacist or doctor — they can give you the right guidance based on your specific dosing schedule.
Is Tetrabenazine available over the counter? ▾
Tetrabenazine is dispensed by prescription according to its FDA labeling, so it isn't sold over the counter. Your prescriber and pharmacist will determine if it's appropriate for you.
When was Tetrabenazine first available? ▾
Tetrabenazine has been available in the United States since at least 2008, based on FDA approval history (Drugs@FDA) and product marketing records.
Who makes Tetrabenazine? ▾
Tetrabenazine is supplied by 21 manufacturers listed in the FDA NDC Directory, including Apotex Corp., Golden State Medical Supply, Inc., Sun Pharmaceutical Industries, Inc..

💬 Answers drafted from Tetrabenazine’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Grounded in that labeling — nothing is made up. How we use AI →

🧰 Keep exploring

📊Tetrabenazine supplement interactions17 checked — ranked by severity 🌿Drug & Supplement CheckerTetrabenazine vs. vitamins & herbs 💬Ask a PharmacistFree answer, usually < 24h 🔎NDC & pricing lookupFind Tetrabenazine NDCs & costs 🅰️Browse Drugs A–ZLook up any medication

💊 How Tetrabenazine comes

Tetrabenazine is available in 1 form. Different forms and brands can have different approved uses, doses, schedules, and directions. Follow the instructions for your exact product, and do not switch forms without guidance from your prescriber or pharmacist.

Tablet

By mouth
Brands Xenazine
How this form is used
What it may be used for
  • Xenazine (tetrabenazine) tablets are indicated for the treatment of chorea associated with Huntington's disease
  • Generic tetrabenazine tablets are indicated for the treatment of chorea associated with Huntington's disease
Important instructions
  • Xenazine and tetrabenazine tablets can be taken with or without food
  • Dosing is started low and increased gradually each week — your doctor will determine the right schedule based on your response and tolerability
  • Depending on total daily dose, tetrabenazine tablets may be taken once, twice, or three times per day — follow your prescriber's specific instructions
  • Patients who need higher daily doses may require a genetic test (CYP2D6 genotyping) before further dose increases are made
Available strengths 2 strengths
12.5 mg 25 mg
46 FDA-listed product records ⓘ

📊 Tetrabenazine across the U.S. market

How Tetrabenazine appears in the FDA’s National Drug Code Directory — including its dosage forms, strengths, brand names, manufacturers, and FDA-listed product records. These are directory records, not sales or prescription volume.

1
Dose forms ⓘ
21
Manufacturers
2
Brand names
56
FDA-listed product records ⓘ
2008
First marketed ⓘ

Also listed with the FDA, not a patient dose form: Powder (10) — bulk drug substance sold to compounders/manufacturers and multi-item kits. These aren’t counted in the dose-form total above.

Apotex Corp.11%
Golden State Medical Supply, Inc.11%
Sun Pharmaceutical Industries, Inc.9%
TAGI Pharma, Inc.7%
Bionpharma Inc.7%
Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.7%
Other makers48%

Share of FDA-listed product records by manufacturer — FDA National Drug Code Directory. Record counts are not sales or prescription volume.

📈 How widely Tetrabenazine is used

A general measure of how commonly Tetrabenazine is prescribed, based on Medicaid — one of the largest public drug programs. The figure below is prescriptions filled in Q1–Q4 2025, summed across every form and brand of the drug.

Think of this as a proxy for how widely Tetrabenazine is used, drawn from freely available public data. Medicaid is just one program — these numbers don’t include Medicare, other government coverage, or commercial and cash-pay prescriptions, so real-world use is higher than what’s shown here.

5,050
Medicaid prescriptions filled (Q1–Q4 2025)
$4.8M gross Medicaid reimbursement (before mandatory rebates — net cost is lower)

How commonly is Tetrabenazine prescribed? Of the 1,596 medications we measure, Tetrabenazine ranks #1,044 by Medicaid prescriptions — more than 35% of them.

Where Tetrabenazine ranks among the drugs we measure · Q1–Q4 2025 · neighbors ±5
Total prescriptions — #1,044 of 1,596
#1,039 Orlistat 5,217 Rx #1,040 Pimozide 5,148 Rx #1,041 Desipramine 5,105 Rx #1,042 Trametinib 5,091 Rx #1,043 Dobutamine 5,077 Rx #1,044 Tetrabenazine 5,050 Rx #1,045 Lanthanum 4,990 Rx #1,046 Acalabrutinib 4,921 Rx #1,047 Ciprofloxacin Injectio... 4,872 Rx #1,048 Lanreotide Injection 4,864 Rx #1,049 Alcohol 4,861 Rx

Utilization by Tetrabenazine product

Pick a product to see its own Medicaid numbers. Each chip is one clinical product — a specific strength & dosage form as defined by RxNorm — with brand-name and generic versions combined.

The 12.5 mg oral tablet is the most-dispensed Tetrabenazine product — about 59% of these Medicaid prescriptions.

tetrabenazine 12.5 MG Oral Tablet Most dispensed

2,968 Medicaid prescriptions (Q1–Q4 2025) 59% of Tetrabenazine prescriptions shown $2.1M gross reimbursement (before rebates) ≈ $709 per prescription (gross)

Summed across the 6 of 18 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 805464

tetrabenazine 25 MG Oral Tablet

2,082 Medicaid prescriptions (Q1–Q4 2025) 41% of Tetrabenazine prescriptions shown $2.7M gross reimbursement (before rebates) ≈ $1,301 per prescription (gross)

Summed across the 7 of 18 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 199592

Shares are of the Medicaid prescriptions shown here. Product grouping follows RxNorm (the National Library of Medicine’s drug terminology), so “one product” means one strength & dosage form regardless of manufacturer. Dollar figures are gross Medicaid reimbursement before mandatory rebates — rebates (often large, especially for brand-name drugs) are confidential, so actual net cost to Medicaid is lower than shown.

Source: Medicaid State Drug Utilization Data (CMS), aggregated by generic ingredient — summed across every NDC (all brands, strengths, salt forms and dosage forms) of Tetrabenazine, and across all states and both fee-for-service and managed-care claims. A general popularity signal; it excludes Medicare, commercial insurance and cash prescriptions, so it is not total U.S. use. Based on the 13 of 36 listed Tetrabenazine NDCs with Medicaid activity.

🔍 Compare Tetrabenazine products

A representative set of FDA-listed product records for Tetrabenazine — across manufacturers, strengths, and dosage forms, grouped by form with each product’s manufacturer and how the FDA approved it. The same medicine may be made and packaged by different companies, so a single drug can have many directory entries. (It’s also why a refill can look different — a new shape, color, or box — even though it contains the same medication.)

Showing 56 of 56 products — FDA National Drug Code Directory. See every product, package size and price: browse all 56 Tetrabenazine NDCs →

RxNorm Concept Web — From Ingredient to Every Form and Strength

This page starts with one ingredient concept (IN). The branches below show its dose-form concepts (SCDF), then the available clinical drug and strength concepts (SCD). Combination products remain separate concepts with their own pages.

Ingredient (IN) Tetrabenazine RxCUI 10390 1 dose form · 2 strengths
  1. Dose form (SCDF) Oral Tablet RxCUI 375312 In current FDA listings
    Clinical drug / strength (SCD) 12.5 MG RxCUI 805464 25 MG RxCUI 199592

Look up RxCUI 10390 in the RxCUI Atlas →

RxNorm is the U.S. National Library of Medicine’s normalized drug vocabulary. Its concept hierarchy can include forms that are not currently marketed; the status on each branch compares that concept with current FDA listings. RxCUIs identify vocabulary concepts, not individual packages or manufacturers.

🏷️ Sold under these brand names

Xenazine

🏭 Manufacturers & labelers

Apotex Corp. 6 Golden State Medical Supply, Inc. 6 Sun Pharmaceutical Industries, Inc. 5 TAGI Pharma, Inc. 4 Bionpharma Inc. 4 Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. 4 Oceanside Pharmaceuticals 4 Agno Pharma Jiangsu 3 Ajanta Pharma USA Inc. 2 Slate Run Pharmaceuticals, LLC 2 Precision Dose Inc. 2 Lupin Pharmaceuticals, Inc. 2 Lundbeck Pharmaceuticals LLC 2 Dr. Reddys Laboratories Inc 2 Camber Pharmaceuticals, Inc. 2 MSN Life Sciences Private Limited 1 Inke SA 1 Piramal Pharma Limited 1 Hetero Drugs Limited 1 Rolabo Outsourcing S.L. 1 Apicore Pharmaceuticals Private Limited 1

RxNorm drug class

Tetrabenazine belongs to the Vesicular Monoamine Transporter 2 Inhibitor class.

Pharmacologic class Vesicular Monoamine Transporter 2 Inhibitor
Drug family (ATC) Other nervous system drugs
How it works Vesicular Monoamine Transporter 2 Inhibitors

Classified by RxNorm RxClass — the U.S. National Library of Medicine's standardized drug-classification service (Established Pharmacologic Class from the FDA, the ATC drug family from the WHO, and mechanism of action). Reference only, not medical advice.

🔬 Where this comes from

Core label, product, RxNorm, safety, and utilization data on this page come from the sources identified below. AI-written, editorial, and licensed sections are labeled separately.

📄
FDA-filed drug labels (SPL) Uses, dosing, warnings & side effects from SPL records retrieved through openFDA; the linked representative set can be verified on DailyMed. ✓ Linked label effective Nov 29, 2019
🏭
Forms, brands & labelersAggregated from ingredient-matched FDA National Drug Code Directory product records for Tetrabenazine.
📈
Real-world reportsThe FDA Adverse Event Reporting System (FAERS), served through openFDA.
🚨
Recalls & shortagesopenFDA drug-enforcement reports and the FDA drug-shortage database.
🧾 Clinical label set — FDA-filed SPL labels retained for Tetrabenazine after exact ingredient or ingredient-combination matching and applicable route/form matching
Clinical labels in scope
12
NDC products indexed
56
Distinct labelers/manufacturers represented
21
Linked representative label ⓘ
Oceanside Pharmaceuticals
Linked label effective
Nov 29, 2019
Composite sections available
26
Linked SPL Set ID
5867189c-17bd-4e70-a079-c4730f9950d1
Linked SPL Document ID
66a8dcef-cfb3-484a-a213-658943881951
Open the linked representative label on DailyMed ↗

How we combine label and product data

HelloPharmacist combines public FDA and NLM records; we don’t author the underlying clinical facts. We identified 12 FDA-filed SPL label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. The representative label is the starting point for the displayed reference monograph; the 12 largest stored in-scope SPL records, which may include that representative, are compared section by section, and the longest available version of each section is retained. Forms, routes, brands, labelers, product-listed strengths, and product-record counts are aggregated separately from ingredient-matched FDA NDC Directory records; package records listed above are associated with the linked SPL; and the normalized concept hierarchy comes from NLM RxNorm.

For canonical ingredient pages, bounded product-attributed indication and administration excerpts may be added to the AI evidence, and the generator is instructed to preserve available product, brand, route, and form qualifiers instead of treating one label as universal. Where a section is identified as AI-written, its plain-language text is generated from bounded label evidence. New draft drug pages remain in the admin review queue before first publication. Oceanside Pharmaceuticals is the representative DailyMed label linked for verification and dates; it is not the sole source used for the page.

This is general education, not medical advice — always consult your doctor or pharmacist about your medications and any medical condition. For the exact wording of the linked representative label, view that label on DailyMed; some displayed composite sections may come from other in-scope SPL labels. Learn how we use AI and our data sources & update cadence.