DIFLUNISAL 500 mg Tablet, Film Coated, 500-count
by Rising Pharmaceuticals Inc. · 500 TABLET, FILM COATED in 1 BOTTLE (64980-181-05)
NDC 64980-0181-05
🏷️ FDA NDC (as labeled)
64980-181-05
billing pads the product segment with a zero
This package
Contains500-count
Pack sizes3 compare ↓
Rx only
Generic
Discontinued
Non-controlled
⚠ Discontinued by firm
🗂️ Data synced Mar 13, 2024 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →
⚠️
Excluded from the active FDA NDC Directory.
The labeler reported this product as discontinued, so it is excluded from the active NDC Directory. The listing was last certified through Jan 2024. A label may still appear on DailyMed, but the NDC is no longer in the current FDA NDC Directory.
Search the FDA NDC Directory ↗
🆔 Identity & classification
FDA NDC (as labeled)
64980-181-05
Product NDC
64980-181
11-digit billing NDC
64980018105
NCPDP billing unit
EA — each (per item)
Application #
ANDA202845
Established class (EPC)
Anti-Inflammatory Agents, Non-Steroidal [CS], Cyclooxygenase Inhibitors [MoA], Nonsteroidal Anti-inflammatory Drug
DEA schedule
Non-controlled
Marketing category
ANDA
Marketing status
Discontinued
FDA listing status
Discontinued by firm (certified through Jan 2024)
Route
ORAL
Dosage form
TABLET, FILM COATED
Substance
DIFLUNISAL
GCN Seq No
004443
GCN
16851
HICL code
001847
Ingredient (HICL)
Diflunisal
HIC1 code
H
Therapeutic class — broad (HIC1)
Nervous System (Except Autonomic)
HIC2 code
H3
Therapeutic class — intermediate (HIC2)
Analgesics
HIC3 code
H3D
Therapeutic class — specific (HIC3)
Analgesic/Antipyretics, Salicylates
AHFS code
28:08.04.04
AHFS class
Reversible Cox-1/Cox-2 Inhibitors
FDB label name
DIFLUNISAL 500 MG TABLET
FDB brand name
Diflunisal
Legend status
F — Federal legend — prescription drug or device
Why two NDCs?
The FDA registers this code as 64980-181-05 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 64980-0181-05. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.
🏭 Manufacturer & labeler
LabelerRising Pharmaceuticals Inc.
Application holderHERITAGE PHARMA LABS INC
FDA applicationANDA202845 (ANDA)
Labeler code64980
Product typeHuman Prescription Drug
The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.
🩺 Clinical
Label name DIFLUNISAL 500 MG TABLET Ingredient Diflunisal
📖 What it is MedlinePlus · NLM
Diflunisal is used to relieve pain, tenderness, swelling and stiffness caused by osteoarthritis (arthritis caused by a breakdown of the lining of the joints) and rheumatoid arthritis (arthritis caused by swelling of the lining of the joints). Diflunisal is also used to relieve mild to moderate pain from other causes. Diflunisal is in a class of medications called NSAIDs. It works by stopping the body's production of a substance that causes pain, fever, and inflammation.
Read the full MedlinePlus article ↗📗 Our plain-language guide HelloPharmacist
- Diflunisal is an anti-inflammatory pain reliever — an NSAID — used to treat mild to moderate pain and to help manage the symptoms of osteoarthritis and rheumatoid arthritis. It can...
- Swallow the tablets whole — don't crush or chew them. For pain, you'll usually take a higher first dose to get things working, then a lower dose every 8 to 12 hours after that. For...
- The most common ones are stomach-related — nausea, stomach pain, diarrhea, and sometimes constipation. You might also notice headache, dizziness, or ringing in your ears. Most of t...
- What side effects should I watch out for?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Diflunisal — tap one for details:
1
Nutrient depletion considerations
Diflunisal may be associated with lower levels of 1 nutrient — worth a chat with your pharmacist, not a cause for alarm.
An association is not a deficiency. Educational only — don't start or stop anything without professional guidance.
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.
💬 Questions about DIFLUNISAL?
Ask a pharmacist →
Ask a licensed pharmacist directly — free, answered by our team.
🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
We could not link this NDC to a current FDA Structured Product Label. An inactive-ingredient list is therefore not available from this source.
Where does this data come from?
Source: official FDA Structured Product Labeling (SPL) via DailyMed and the openFDA label index. Structured
IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.
💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · quarterly | No Part D plan price is available for this NDC in our data. | |
ℹ️
No price is published for this exact package yet. CMS surveys NADAC per package size, so a different pack of the same drug often has one.
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Diflunisal 500 mg 00093-9222-01 | Teva | 100 tablets | $1.043 | AB | Availability likely | — |
| diflunisal 500 mg 14539-0673-01 | Heritage | 100 tablets | $1.043 | — | Availability likely | — |
| Diflunisal 500 mg 62135-0456-60 | Chartwell | 60 tablets | $1.043 | — | Availability likely | — |
| Diflunisal 500 mg 68382-0530-01 | Zydus | 100 tablets | — | AB | FDA listed | — |
| Diflunisal 500 mg 70771-1083-00 | Zydus | 1000 tablets | — | AB | FDA listed | — |
| Diflunisal 500 mgthis 64980-0181-05 | Rising | 500 tablets | — | — | Discontinued | — |
About this product: this is a generic version of the medicine. FDA equivalence ratings are shown when available, and other versions are listed above, least expensive first.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.
⏳ Availability & generic status
📍
2026
Currently FDA-listed
listed with the FDA
🔓
·
Generic on the market
this product is a generic
✅This is a generic drug
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
Medicare Part D (outpatient prescription) spending for Diflunisal — the program that covers self-administered drugs. 2 manufacturers.
⚠️ Drug-level data: CMS publishes Part D spending by drug, not by NDC — these figures combine every manufacturer, strength and package size sold under the name Diflunisal. That’s a different level of aggregation than the Medicaid card above, which is specific to this exact 11-digit NDC (pack size included), so the two aren’t directly comparable.
Period
Total Part D spend
$174.9K
Claims incl. refills
1.9K
Beneficiaries
1.4K
Spend / beneficiary
$125.41
Spend / claim
$91.16
Trend by period
💵 About the dollar figures: spending is what Part D plans paid before confidential manufacturer rebates, so the program’s real net cost is lower. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part D Spending by Drug (data.cms.gov), updated quarterly.
📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 64980-0181-01 | 100 TABLET, FILM COATED in 1 BOTTLE (64980-181-01) | 2012-05-01 | Discontinued by firm |
| 64980-0181-05 You're viewing this | 500 TABLET, FILM COATED in 1 BOTTLE (64980-181-05) | 2012-05-01 | Discontinued by firm |
| 64980-0181-06 | 60 TABLET, FILM COATED in 1 BOTTLE (64980-181-06) | 2012-05-01 | Discontinued by firm |
You're viewing the largest of 3 pack sizes for this product.
Pack size FAQ
What quantity is in NDC 64980-0181-05?
NDC 64980-0181-05 is a 500-count package — 500 tablet, film coated in 1 bottle.
What is the difference between NDC 64980-0181-05 and NDC 64980-0181-06?
Both are DIFLUNISAL 500 mg Tablet, Film Coated — the drug itself is identical. NDC 64980-0181-05 is the 500-count package, while NDC 64980-0181-06 is the 60 tablets package.
What NDC number is used to bill for this package of DIFLUNISAL 500 mg Tablet, Film Coated?
Bill NDC 64980-0181-05 — the 11-digit billing format is 64980018105. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.
🧭 About this NDC listing & data coverage
Finished prescription product
No longer marketed (per FDA listing data)
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | — Not published for this NDC No structured label is linked to this listing in DailyMed/openFDA. |
| Package photos | — Not published for this NDC The FDA label for this product carries no photos. |
| Inactive ingredients (structured) | — Not published for this NDC The labeler did not submit a structured excipient list, or no SPL is available. |
| NADAC pharmacy acquisition price (CMS) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope. |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.
Questions about this listing
Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
Why is there no full label on this page?
No structured FDA label (SPL) is currently linked to this NDC in DailyMed/openFDA. That can happen with older listings, certain OTC and repackaged products, and recently updated listings whose label has not yet propagated. The listing itself is still valid — this page shows everything the public feeds provide for this package.
What does the discontinued status mean for this NDC?
The labeler reported a marketing end date (or the listing was delisted), so this specific package is no longer actively marketed. Remaining stock may still be dispensed for a time, and the NDC stays valid for historical records and claims — but data feeds (pricing, labeling) typically stop updating for it. Other package sizes or other manufacturers' versions of the same medication may still be marketed — see the equivalents section where available.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The FDA registers it as 64980-181-05, which is what is printed on the packaging and shown on DailyMed. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero: 64980-0181-05, written without dashes as 64980018105. The Identity section at the top of this page lists every form of this code.
What do the three segments of this NDC mean?
In 64980-0181-05, the first segment (64980) is the labeler code FDA assigned to Rising Pharmaceuticals Inc.; the middle segment (0181) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (05) identifies this exact package size and type. Together they name one specific package of one specific product.
Does this product come in other package sizes?
Yes — the FDA directory lists 2 other package presentations of this same product, including 60 tablets (64980-0181-06), 100 tablets (64980-0181-01). Each has its own NDC and its own page — see the package list near the top of this page.
Who lists this product with the FDA?
Rising Pharmaceuticals Inc. is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as a prescription product, so it is dispensed under a prescriber's order. Your pharmacist can tell you whether any over-the-counter forms of the same medication exist.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
📄 Full prescribing information FDA SPL
The complete FDA label for this product — the official prescribing information, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
📄 FDA label ▾
No FDA label is on file for this product yet. Labels load from openFDA / DailyMed and refresh weekly.
No label section mentions that — try another word, or open the full label on DailyMed below.
Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA.
For educational and professional reference only — not medical advice. Pricing reflects published
NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.