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Dalfampridine 10 mg Tablet, Extended Release, 60-count — NDC 72162-2459-06 package photo
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Dalfampridine 10 mg Tablet, Extended Release, 60-count — NDC 72162-2459-6 (Billing 72162-2459-06)

by Bryant Ranch Prepack · 60 TABLET, EXTENDED RELEASE in 1 BOTTLE

This is a package of 60 tablets of Dalfampridine 10 mg Tablet, Extended Release from Bryant Ranch Prepack, marketed since Mar 2019 and currently FDA-listed. It is this product's only package size.

NDC 72162-2459-06
🏷️ FDA NDC (as labeled) 72162-2459-6 billing pads the package segment with a zero
Rx only Generic On market Non-controlled ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 1, 2026 · this listing last changed Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

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Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 72162-2459-6
Product NDC 72162-2459
11-digit billing NDC 72162245906
NCPDP billing unit EA — each (per item)
RxCUI 897021
UNII BH3B64OKL9
Application # ANDA210158
SPL Set ID 688eb479-debc-4cfc-a74d-14828c347049
Established class (EPC) Potassium Channel Blocker
Mechanism of action Potassium Channel Antagonists
DEA schedule Non-controlled
Marketing category ANDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2019-03-21
Route ORAL
Dosage form TABLET, EXTENDED RELEASE
Substance DALFAMPRIDINE
TE code (Orange Book) AB · RLD · RS

Drug-database identifiers Medi-Span GPI and First Databank GCN / HICL / AHFS classification

GCN Seq No 066066
GCN 28246
HICL code 013907
Ingredient (HICL) Dalfampridine
HIC1 code H
Therapeutic class — broad (HIC1) Nervous System (Except Autonomic)
HIC2 code H0
Therapeutic class — intermediate (HIC2) Act On Non-Autonomic Nervous System
HIC3 code H0F
Therapeutic class — specific (HIC3) Agts Tx Neuromusc Transmission Dis,Pot-Chan Blkr
AHFS code 92:56.00.00
AHFS class Protective Agents
FDB label name DALFAMPRIDINE ER 10 MG TABLET
FDB brand name Dalfampridine Er
Legend status F — Federal legend — prescription drug or device
Quick answers
  • GSN (GCN sequence number): 066066
  • GCN: 28246
  • HICL (First Databank): 013907
  • AHFS class code: 92:56.00.00
  • RxCUI (RxNorm): 897021
Why two NDCs? The FDA registers this code as 72162-2459-6 — a 5-4-1 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 package segment → 72162-2459-06. 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.

RxNorm drug class

This medicine belongs to the Potassium Channel Blocker class.

Pharmacologic class Potassium Channel Blocker
Drug family (ATC) Other nervous system drugs
How it works Potassium Channel Antagonists
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

Clinical

Label name DALFAMPRIDINE ER 10 MG TABLET Ingredient Dalfampridine
📖 What it is MedlinePlus · NLM

Dalfampridine is used to improve walking in people who have multiple sclerosis (MS; a disease in which the nerves do not function properly and may cause weakness, numbness, loss of muscle coordination, and problems with vision, speech, and bladder control). Dalfampridine may be used alone or with other medications that control the symptoms of MS. Dalfampridine is in a class of medications called potassium channel blockers. It works by strengthening the signals sent by the brain through nerves that have been damaged by MS.

Read the full MedlinePlus article ↗
📗 Our plain-language guide HelloPharmacist
  • Dalfampridine is used to improve walking in adults with multiple sclerosis. In studies, people walked faster on it. It treats walking ability rather than the MS itself.
  • Take one tablet twice a day, about 12 hours apart, with or without food. Swallow it whole. Do not split, crush or chew it. If you miss a dose, just skip it and take the next one on...
  • People most often reported urinary tract infections, trouble sleeping, dizziness, headache, nausea, weakness and back pain. Tell your doctor or pharmacist if these bother you or do...
  • If you have a seizure, stop the medicine and get medical help. Do not restart it. Also get emergency help for trouble breathing, hives, or swelling of the throat or tongue, which c...
📖 Read our full Dalfampridine guide →
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.

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 systemPer eachPer 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 · Q2 2026 $2.60 $155.77 / 60 tablets
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.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
72162-2459-06 You're viewing this Main listing 60 TABLET, EXTENDED RELEASE in 1 BOTTLE 2025-02-12 — Active

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Dalfampridine 10 mg 62756-0429-86 Sun 60 tablets $0.396 — FDA listed —
Dalfampridine 10 mg 00591-2533-60 Actavis 60 tablets $0.399 AB Availability likely —
Dalfampridine 10 mg 16729-0292-12 Accord 60 tablets $0.399 AB Availability likely —
Dalfampridine 10 mg 82249-0702-60 CivicaScript 60 tablets $0.399 AB Availability likely —
Ampyra 10 mg 00259-5010-60 Merz 60 tablets — AB FDA listed —
Ampyra 10 mg 10144-0427-60 Merz 60 tablets — AB FDA listed —
Dalfampridine 10 mg 42571-0275-05 Micro 500 tablets — AB FDA listed —
Dalfampridine 10 mg 51407-0876-60 Golden 60 tablets — AB FDA listed —
Dalfampridine 10 mg 63629-9450-01 Bryant 60 tablets — AB Discontinued —
Dalfampridine 10 mg 65862-0863-01 Aurobindo 100 tablets — AB FDA listed —
Dalfampridine 10 mg 67877-0444-05 Ascend 500 tablets — AB FDA listed —
Dalfampridine 10 mgthis 72162-2459-06 Bryant 60 tablets — AB FDA listed —
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

🏛️
2019
On the market since
Mar 2019
📍
2026
Currently FDA-listed
7 years listed
🔓
·
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.

What it looks like

Color white
ShapeOval
ImprintC51
Size13 mm
ScoringNot scored
One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.
Where does this data come from?
Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

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.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII 3NXW29V3WO
    Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
  • UNII 70097M6I30
    Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
  • UNII OP1R32D61U
    Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
  • UNII 3WJQ0SDW1A
    Polyethylene glycol is a synthetic liquid or solid polymer used in medicines as a solvent, lubricant, and humectant. It helps dissolve active ingredients, reduces friction during manufacturing, and retains moisture in the final product.
  • UNII ETJ7Z6XBU4
    Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
  • UNII 15FIX9V2JP
    Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.

6 inactive ingredients listed in the exact product block matched to this NDC.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

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.

Manufacturer & labeler

LabelerBryant Ranch Prepack
Application holderMICRO LABS LTD
FDA applicationANDA210158 (ANDA)
Labeler code72162
First marketedMar 2019
Product typeHuman Prescription Drug
Portfolio4,434 products on file
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.

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.
🎯 Indications and Usage ⏱️ Dosage and Administration 💊 Dosage Forms and Strengths ⛔ Contraindications ⚠️ Warnings and Cautions 🤒 Adverse Reactions 🔄 Drug Interactions 👥 Use in Specific Populations 🤰 Pregnancy 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📋 Description 💬 Information for Patients 💬 Medication Guide
🎯 Indications and Usage 67 words ▾

1 INDICATIONS AND USAGE Dalfampridine extended-release tablet is indicated as a treatment to improve walking in adult patients with multiple sclerosis (MS). This was demonstrated by an increase in walking speed [see Clinical Studies (14) ]. Dalfampridine extended-release tablet is a potassium channel blocker indicated to improve walking in adult patients with multiple sclerosis (MS). This was demonstrated by an increase in walking speed (1, 14) .

⏱️ Dosage and Administration ~2 min read ▾

2 DOSAGE AND ADMINISTRATION The maximum recommended dosage is 10 mg twice daily (approximately 12 hours apart). There is no evidence of additional benefit with doses greater than 10 mg twice daily. Adverse reactions, including seizures, were more frequent at higher doses.

( 2.1 ) Take with or without food. Administer tablets whole; do not divide, crush, chew, or dissolve ( 2.2 ) Patients should not take double or extra doses if they miss a dose. ( 2.2 ) Estimated creatinine clearance (CrCl) should be known before initiating treatment with dalfampridine.

In patients with mild renal impairment (CrCl 51 to 80 mL/min), dalfampridine may reach plasma levels associated with a greater risk of seizures, and the potential benefits of dalfampridine should be carefully considered against the risk of seizures in these patients ( 2.3 , 5.2 , 8.6 )

2.1Dosage Information The maximum recommended dosage of dalfampridine is one 10 mg tablet twice daily and should not be exceeded. Take doses approximately 12 hours apart. There is no evidence of additional benefit at doses greater than 10 mg twice daily. Adverse reactions, including seizures, and discontinuations because of adverse reactions were more frequent at higher doses.

2.2Administration Instructions Dalfampridine can be taken with or without food. Administer tablets whole; do not divide, crush, chew, or dissolve dalfampridine tablets. If a dose is missed, patients should not take double or extra doses.

2.3Renal Monitoring Prior to and During Treatment Estimated creatinine clearance (CrCl) should be known before initiating treatment with dalfampridine, and monitored at least annually during treatment with dalfampridine. CrCl can be estimated using the following equation (multiply by 0.85 for women): CrCl = (140 − age) × weight (kg) SerumCr (mg / dl) × 72

2.4Dosage in Patients with Renal Impairment In patients with mild renal impairment (CrCl 51 to 80 mL/min), dalfampridine plasma levels may approach those seen at a dose of 15 mg twice daily, a dose that is 1.5 times the maximum recommended dose and may be associated with an increased risk of seizures. As mild renal impairment is common after age 50, estimating CrCl is particularly important in these patients. The potential benefits of dalfampridine should be carefully considered against the risk of seizures in these patients [see Warnings and Precautions (5.2) and Clinical Pharmacology (12.3) ].

Dalfampridine is contraindicated in patients with moderate or severe renal impairment (CrCl≤50 mL/min).

💊 Dosage Forms and Strengths 53 words ▾

3 DOSAGE FORMS AND STRENGTHS Dalfampridine extended-release tablet is available in a 10 mg strength and is white to off-white colored, oval shaped, biconvex, film coated tablet debossed with “C51” on one side and plain on other side. Tablet dimensions are approximately 13 mm (Length) and 8 mm (Width). 10 mg tablets (3)

⛔ Contraindications 71 words ▾

4 CONTRAINDICATIONS The use of dalfampridine is contraindicated in the following conditions: History of seizure [see Warnings and Precautions (5.1) ] Moderate or severe renal impairment (CrCl≤50 mL/min) [see Warnings and Precautions (5.2) ] History of hypersensitivity to dalfampridine or 4-aminopyridine; reactions have included anaphylaxis [see Warnings and Precautions (5.4) ] History of seizure (4) Moderate or severe renal impairment (CrCl≤50 mL/min) (4) History of hypersensitivity to dalfampridine or 4-aminopyridine (4)

⚠️ Warnings and Cautions ~2 min read ▾

5 WARNINGS AND PRECAUTIONS Dalfampridine can cause seizures; the risk of seizures increases with increasing dalfampridine doses; discontinue dalfampridine and do not restart if a seizure occurs (5.1) Avoid concomitant use with other forms of 4-aminopyridine (4­AP, fampridine), since the active ingredient is the same (5.3) Dalfampridine can cause anaphylaxis. Discontinue and do not restart dalfampridine if this occurs (5.4)

5.1Seizures Dalfampridine can cause seizures. Increased incidence of seizures has been observed at 20 mg twice daily (2 times the maximum recommended dosage) in controlled clinical studies of 9 to 14 weeks duration with dalfampridine in patients with MS. In open-label extension trials in MS patients, the incidence of seizures during treatment with dalfampridine 15 mg twice daily (1.7/100PY) was over 4 times higher than the incidence during treatment with 10 mg twice daily (0.4/100PY).

In the post-marketing period seizures have been reported. The majority of seizures occurred at the recommended dose and in patients without a history of seizures, and generally within days to weeks of starting therapy. Dalfampridine has not been evaluated in patients with a history of seizures or with evidence of epileptiform activity on an EEG, as these patients were excluded from clinical trials.

The risk of seizures in patients with epileptiform activity on an EEG is unknown, and could be substantially higher than that observed in dalfampridine clinical studies. Permanently discontinue dalfampridine in patients who have a seizure while on treatment. Dalfampridine is contraindicated in patients with a history of seizures [see Contraindications (4) ] .

5.2Renal Impairment Dalfampridine is eliminated through the kidneys primarily as unchanged drug [see Clinical Pharmacology (12.3) ]. Because patients with moderate to severe renal impairment (CrCl ≤50mL/min) would require a dose lower than 10 mg twice daily and no strength smaller than 10 mg is available, dalfampridine is contraindicated in these patients [see Contraindications (4) ] . In patients with mild renal impairment (CrCl 51 to 80 mL/min), dalfampridine plasma levels may approach those seen at a dose of 15 mg twice daily, a dose that may be associated with an increased risk of seizures [see Warnings and Precautions (5.1) ] .

5.3Concurrent Treatment with Other Forms of 4-Aminopyridine Avoid concomitant use with other forms of 4-aminopyridine (4-AP, fampridine) since the active ingredient is the same. Instruct patients to discontinue use of any product containing 4­-aminopyridine prior to initiating treatment with dalfampridine in order to reduce the potential for dose-related adverse reactions.

5.4Anaphylaxis Dalfampridine can cause anaphylaxis and severe allergic reactions. Signs and symptoms have included respiratory compromise, urticaria, and angioedema of the throat and or tongue. Dalfampridine is contraindicated in patients with a history of hypersensitivity to dalfampridine or 4­aminopyridine.

Inform patients of the signs and symptoms of anaphylaxis and instruct them to discontinue dalfampridine and seek immediate medical care should these signs and symptoms occur.

🤒 Adverse Reactions ~2 min read ▾

6 ADVERSE REACTIONS The following serious adverse reactions are described in more detail elsewhere in the labeling: Seizures [see Warnings and Precautions (5.1) ] Anaphylaxis [see Warnings and Precautions (5.4) ] The most common adverse events (incidence ≥2% and at a rate greater than the placebo rate) for dalfampridine were urinary tract infection, insomnia, dizziness, headache, nausea, asthenia, back pain, balance disorder, multiple sclerosis relapse, paresthesia, nasopharyngitis, constipation, dyspepsia, and pharyngolaryngeal pain (6.1) .

To report SUSPECTED ADVERSE REACTIONS, contact Micro Labs USA, Inc. at 1-855-839-8195 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Clinical Trials Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. In three placebo-controlled clinical trials of up to 14 weeks duration, 4% (15/400) of patients treated with dalfampridine extended-release tablets 10 mg twice daily experienced one or more adverse reactions leading to discontinuation, compared to 2% (5/238) of placebo-treated patients.

The adverse reactions leading to discontinuation of at least 2 patients treated with dalfampridine and that led to discontinuation more frequently compared to placebo were headache (dalfampridine 0.5%, placebo 0%), balance disorder (dalfampridine 0.5%, placebo 0%), dizziness (dalfampridine 0.5%, placebo 0%), and confusional state (dalfampridine 0.3%, placebo 0%). Table 1 lists adverse reactions that occurred in ≥2% of patients treated with dalfampridine extended-release tablets 10 mg twice daily, and more frequently than in placebo-treated patients, in controlled clinical trials.

Table 1: Adverse Reactions with an Incidence ≥2% of Dalfampridine-Treated Adult MS Patients and More Frequent with Dalfampridine Compared to Placebo in Controlled Clinical Trials Adverse Reaction Placebo (N=238) % Dalfampridine 10 mg twice daily (N=400) % Urinary tract infection 8 12 Insomnia 4 9 Dizziness 4 7 Headache 4 7 Nausea 3 7 Asthenia 4 7 Back pain 2 5 Balance disorder 1 5 Multiple sclerosis relapse 3 4 Paresthesia 3 4 Nasopharyngitis 2 4 Constipation 2 3 Dyspepsia 1 2 Pharyngolaryngeal pain 1 2 Other Adverse Reactions Dalfampridine has been evaluated in a total of 1,952 subjects, including 917 MS patients.

A total of 741 patients have been treated with dalfampridine for over six months, 501 for over one year and 352 for over two years. The experience in open-label clinical trials is consistent with the safety profile observed in the placebo-controlled clinical trials. As in controlled clinical trials, a dose-dependent increase in the incidence of seizures has been observed in open-label clinical trials with dalfampridine in patients with MS as follows: dalfampridine extended-release tablets 10 mg twice daily 0.41 per 100 person-years (95% confidence interval 0.13 to 0.96); dalfampridine 15 mg twice daily 1.7 per 100 person-years (95% confidence interval 0.21 to 6.28).

6.2Postmarketing Experience The following adverse reactions have been identified during post approval use with dalfampridine. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure: vomiting, vertigo.

🔄 Drug Interactions 96 words ▾

7 DRUG INTERACTIONS OCT2 Inhibitors: Concomitant use may cause an increased exposure and potential risk of seizures ( 7.1 )

7.1OCT2 Inhibitors Concurrent treatment with OCT2 inhibitors, such as cimetidine, may cause increased exposure to dalfampridine [see Clinical Pharmacology (12.3) ] . Elevated levels of dalfampridine increase the risk of seizures [see Warnings and Precautions (5.1 , 5.2 )]. The potential benefits of taking OCT2 inhibitors concurrently with dalfampridine should be considered against the risk of seizures in these patients.

7.2Baclofen No interaction was identified between dalfampridine and baclofen [see Clinical Pharmacology (12.3) ].

👥 Use in Specific Populations ~3 min read ▾

8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data, may cause fetal harm (8.1) Geriatric use: Because elderly patients are more likely to have decreased renal function, it is particularly important to know the estimated CrCl in these patients before initiating dalfampridine treatment (4, 5.2, 8.6)

8.1Pregnancy Risk Summary There are no adequate data on the developmental risk associated with use of dalfampridine in pregnant women. Administration of dalfampridine to animals during pregnancy and lactation resulted in decreased offspring viability and growth at clinically relevant doses [ see Data ]. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

The background risk of major birth defects and miscarriage for the indicated population is unknown. Data Animal Data Oral administration of dalfampridine to pregnant rats and rabbits throughout organogenesis resulted in no evidence of developmental toxicity in either species. The highest doses tested (10 mg/kg/day in rats, 5 mg/kg/day in rabbits), which were associated with maternal toxicity, are approximately 5 times the MRHD on a body surface area (mg/m 2 ) basis.

Oral administration of dalfampridine (0, 1, 3, and 9 to 6 mg/kg/day; high dose reduced during the second week of dosing) to female rats throughout pregnancy and lactation resulted in decreased offspring viability at the highest dose tested and decreased body weight in offspring at the mid and high doses. The no-effect dose for pre-and postnatal developmental toxicity in rats (1 mg/kg/day) is less than the MRHD on a mg/m 2 basis.

8.2Lactation Risk Summary There are no data on the presence of dalfampridine in human milk, the effects of dalfampridine on the breastfed infant, or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for dalfampridine and any potential adverse effects on the breastfed infant from dalfampridine or from the underlying maternal condition.

8.4Pediatric Use Safety and effectiveness in patients younger than 18 years of age have not been established.

8.5Geriatric Use Clinical studies of dalfampridine did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently than younger subjects. A population PK analysis showed that dalfampridine clearance modestly decreased with increasing age, but not sufficiently to necessitate a modification of dose with age. Other reported clinical experience has identified no differences in responses between the elderly and younger patients.

Dalfampridine is known to be substantially excreted by the kidneys and the risk of adverse reactions, including seizures, is greater with increasing exposure of dalfampridine. Because elderly patients are more likely to have decreased renal function, it is particularly important to know the estimated creatinine clearance (CrCl) in these patients [see Warnings and Precautions (5.2) ].

8.6Impaired Renal Function Clearance of dalfampridine is decreased in patients with renal impairment and is significantly correlated with creatinine clearance (CrCl) [see Clinical Pharmacology (12.3) ] . Dalfampridine is contraindicated in patients with moderate or severe renal impairment (CrCl ≤50 mL/min) [see Contraindications (4) ]. The risk of seizures in patients with mild renal impairment (CrCl 51 to 80 mL/min) is unknown, but dalfampridine plasma levels in these patients may approach those seen at a dose of 15 mg twice daily, a dose that may be associated with an increased risk of seizures.

If unknown, estimated creatinine clearance should be calculated prior to initiating treatment with dalfampridine [see Dosage and Administration (2.3) and Warnings and Precautions (5.2) ] .

🤰 Pregnancy 217 words ▾

8.1Pregnancy Risk Summary There are no adequate data on the developmental risk associated with use of dalfampridine in pregnant women. Administration of dalfampridine to animals during pregnancy and lactation resulted in decreased offspring viability and growth at clinically relevant doses [ see Data ]. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

The background risk of major birth defects and miscarriage for the indicated population is unknown. Data Animal Data Oral administration of dalfampridine to pregnant rats and rabbits throughout organogenesis resulted in no evidence of developmental toxicity in either species. The highest doses tested (10 mg/kg/day in rats, 5 mg/kg/day in rabbits), which were associated with maternal toxicity, are approximately 5 times the MRHD on a body surface area (mg/m 2 ) basis.

Oral administration of dalfampridine (0, 1, 3, and 9 to 6 mg/kg/day; high dose reduced during the second week of dosing) to female rats throughout pregnancy and lactation resulted in decreased offspring viability at the highest dose tested and decreased body weight in offspring at the mid and high doses. The no-effect dose for pre-and postnatal developmental toxicity in rats (1 mg/kg/day) is less than the MRHD on a mg/m 2 basis.

🧒 Pediatric Use 18 words ▾

8.4Pediatric Use Safety and effectiveness in patients younger than 18 years of age have not been established.

🧓 Geriatric Use 123 words ▾

8.5Geriatric Use Clinical studies of dalfampridine did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently than younger subjects. A population PK analysis showed that dalfampridine clearance modestly decreased with increasing age, but not sufficiently to necessitate a modification of dose with age. Other reported clinical experience has identified no differences in responses between the elderly and younger patients.

Dalfampridine is known to be substantially excreted by the kidneys and the risk of adverse reactions, including seizures, is greater with increasing exposure of dalfampridine. Because elderly patients are more likely to have decreased renal function, it is particularly important to know the estimated creatinine clearance (CrCl) in these patients [see Warnings and Precautions (5.2) ].

🆘 Overdosage 208 words ▾

10 OVERDOSAGE Three cases of overdose were reported in controlled clinical trials with dalfampridine, involving two MS patients. The first patient took six times the currently recommended dose (60 mg) and was taken to the emergency room with altered mental state. The second patient took 40 mg doses on two separate occasions.

In the first instance, she experienced a complex partial seizure and, in the second instance, a period of confusion. Both patients recovered by the following day without sequelae. Several cases of overdose are found in the scientific literature in which various formulations of dalfampridine were used, resulting in numerous adverse events including seizure, confusion, tremulousness, diaphoresis, and amnesia.

In some instances, patients developed status epilepticus, requiring intensive supportive care and were responsive to standard therapy for seizures. In one published case report, an MS patient who ingested 300 mg of 4-aminopyridine (dalfampridine) developed a condition that resembled limbic encephalitis. This patient developed weakness, reduced awareness, memory loss, hypophonic speech, and temporal lobe hyperintensities on MRI.

The patient’s speech and language and ambulation improved over time, and an MRI at 4 months after the overdose no longer showed signal abnormalities. At one year, the patient continued to have difficulty with short term memory and learning new tasks.

🧬 Clinical Pharmacology ~3 min read ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism of action The mechanism by which dalfampridine exerts its therapeutic effect has not been fully elucidated. Dalfampridine is a broad spectrum potassium channel blocker. In animal studies, dalfampridine has been shown to increase conduction of action potentials in demyelinated axons through inhibition of potassium channels.

12.2Pharmacodynamics Dalfampridine does not prolong the QTc interval and does not have a clinically important effect on QRS duration.

12.3Pharmacokinetics Absorption and Distribution Orally administered dalfampridine is rapidly and completely absorbed from the gastrointestinal tract. Absolute bioavailability of extended release dalfampridine tablets has not been assessed, but relative bioavailability is 96% when compared to an aqueous oral solution. The extended release tablet delays absorption of dalfampridine relative to the solution formulation, giving a slower rise to a lower peak concentration (C max ), with no effect on the extent of absorption (AUC).

Single dalfampridine extended-release tablet 10 mg doses administered to healthy volunteers in a fasted state gave peak concentrations ranging from 17.3 ng/mL to 21.6 ng/mL occurring 3 to 4 hours post- administration (T max ). In comparison, C max with the same 10 mg dose of dalfampridine in an oral solution was 42.7 ng/mL and occurred approximately 1.3 hours after dosing. Exposure increased proportionally with dose.

Dalfampridine is largely unbound to plasma proteins (97 to 99%). The apparent volume of distribution is

2.6L/kg. There is no apparent difference in pharmacokinetic parameter values following administration of dalfampridine extended-release tablets to either healthy volunteers or patients with MS. When dalfampridine is taken with food, there is a slight increase in C max (12 to 17%) and a slight decrease in AUC (4 to 7%).

These changes in exposure are not clinically significant, and therefore the drug may be taken with or without food [see Dosage and Administration (2.2) ]. Metabolism and Elimination Dalfampridine and metabolites elimination is nearly complete after 24 hours, with 95.9% of the dose recovered in urine and 0.5% recovered in feces. Most of the excreted radioactivity in urine was parent drug (90.3%).

Two metabolites were identified: 3-hydroxy-4-aminopyridine (4.3%) and 3-hydroxy-4-aminopyridine sulfate (2.6%). These metabolites have been shown to have no pharmacologic activity on potassium channels. The apparent elimination half-life of dalfampridine following administration of the extended release tablet formulation of dalfampridine is 5.2 to 6.5 hours.

The plasma half-life of the sulfate conjugate is approximately 7.6 hours and the half-life of 3-hydroxy-4-aminopyridine could not be calculated because concentrations for most subjects were close to or below the limit of quantitation. In vitro studies with human liver microsomes indicate that CYP2E1 was the major enzyme responsible for the 3-hydroxylation of dalfampridine. The identity of the CYP enzymes suspected of playing a minor role in the 3-hydroxylation of dalfampridine could not be established unequivocally.

Specific Populations Pediatric The safety and effectiveness in patients younger than 18 years of age have not been established. Geriatric A population pharmacokinetic analysis showed that dalfampridine clearance modestly decreased with increasing age, but not sufficiently to necessitate a modification of dose. Gender A population pharmacokinetic analysis suggested that female patients would be expected to have higher maximum dalfampridine plasma concentration than male patients.

The magnitude of these differences is small and does not necessitate any dose modification. Renal Impairment [see Contraindications (4) and Warnings and Precautions (5.2) ]. The pharmacokinetics of dalfampridine was studied in 9 male and 11 female subjects with varying degrees of renal function.

Elimination of the drug is significantly correlated with…

🧬 Mechanism of Action 47 words ▾

12.1Mechanism of action The mechanism by which dalfampridine exerts its therapeutic effect has not been fully elucidated. Dalfampridine is a broad spectrum potassium channel blocker. In animal studies, dalfampridine has been shown to increase conduction of action potentials in demyelinated axons through inhibition of potassium channels.

📦 How Supplied / Storage and Handling 72 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING Dalfampridine extended-release tablets, 10 mg are film-coated, white to off-white colored oval shaped, biconvex, film coated tablet debossed with “C51” on one side and plain on other side. Tablet dimensions are approximately 13 mm (Length) and 8 mm (Width). NDC: 72162-2459-6: 60 Tablets in a BOTTLE Store at 25°C (77°F).

Excursions permitted 15ºC to 30ºC (59ºF to 86ºF). Repackaged/Relabeled by: Bryant Ranch Prepack, Inc. Burbank, CA 91504

📋 Description 150 words ▾

11 DESCRIPTION Dalfampridine extended-release tablet is a potassium channel blocker, available in a 10 mg tablet strength. Each tablet contains 10 mg dalfampridine, formulated as an extended-release tablet for twice-daily oral administration. Dalfampridine is also known by its chemical name, 4-aminopyridine, with the following structure: Dalfampridine extended-release tablets are available in a 10 mg strength and are white to off-white colored oval shaped biconvex film coated tablet debossed with “C51” on one side and plain on other side.

Tablet dimensions are approximately 13 mm (Length) and 8 mm (Width). Inactive ingredients consist of hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycols, silicon dioxide and titanium dioxide. Dalfampridine is a fine white to off-white powder with a molecular weight of 94.1, CAS 504-24-5, and a molecular formula of C 5 H 6 N 2 .

At ambient conditions, dalfampridine is soluble in water, methanol, acetone, tetrahydrofuran, isopropanol, acetonitrile, N,N-dimethylformamide, dimethylsulfoxide, and ethanol.

💬 Information for Patients ~1 min read ▾

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Medication Guide). Risk of Seizures Inform patients that dalfampridine can cause seizures, and that they must discontinue use of dalfampridine if they experience a seizure [see Warnings and Precautions (5.1) ]. Dalfampridine dosing Instruct patients to take dalfampridine exactly as prescribed.

Instruct patients not to take a double dose after they miss a dose, as this would increase their risk of seizure. Instruct patients not to take more than 2 tablets in a 24-hour period and to make sure that there is an approximate 12­hour interval between doses [see Dosage and Administration (2.1 , 2.2) ]. Anaphylaxis Advise patients to discontinue dalfampridine and seek medical care if they develop signs and symptoms of anaphylaxis [see Warnings and Precautions (5.4) ].

Effects on Driving or Using Machinery Counsel patients that central nervous system-related adverse reactions, such as vertigo and dizziness, associated with the use of dalfampridine extended-release tablets might impair their ability to drive or use machinery should they develop these symptoms. Drug Interactions Instruct patients to notify their healthcare provider prior to starting any new medication, including over-the-counter drugs. Storage Advise patients to store dalfampridine extended-release tablets at 25°C (77°F), with excursions permitted to 15ºC to 30ºC (59ºF to 86ºF).

Advise patients to safely throw away dalfampridine extended-release tablets that is out of date or no longer needed. Manufactured by: Micro Labs Limited Goa-403722, INDIA. Manufactured for: Micro Labs USA, Inc.

Somerset, NJ 08873 Rev.12/2021

💬 Medication Guide ~3 min read ▾

MEDICATION GUIDE Dalfampridine (dal-FAM-pri-deen ) Extended-Release Tablets Read this Medication Guide before you start taking dalfampridine extended-release tablets and each time you get a refill. There may be new information. This information does not take the place of talking with your doctor about your medical condition or your treatment.

What is the most important information I should know about dalfampridine extended-release tablets? Dalfampridine extended-release tablets can cause seizures. You could have a seizure even if you never had a seizure before.

Your chance of having a seizure is higher if you take too much dalfampridine extended-release tablets or if your kidneys have a mild decrease of function, which is common after age 50. Your doctor may do a blood test to check how well your kidneys are working, if that is not known before you start taking dalfampridine extended-release tablets. Do not take dalfampridine extended-release tablets if you have ever had a seizure.

Before taking dalfampridine extended-release tablets tell your doctor if you have kidney problems. Take dalfampridine extended-release tablets exactly as prescribed by your doctor. See “How should I take dalfampridine extended-release tablets?” Stop taking dalfampridine extended-release tablets and call your doctor right away if you have a seizure while taking dalfampridine extended-release tablets .

What are dalfampridine extended-release tablets ? Dalfampridine extended-release tablets are a prescription medicine used to help improve walking in adults with multiple sclerosis (MS). This was shown by an increase in walking speed.

It is not known if dalfampridine extended-release tablet is safe or effective in children less than 18 years of age. Who should not take dalfampridine extended-release tablets? Do not take dalfampridine extended-release tablets if you: have ever had a seizure have certain types of kidney problems are allergic to dalfampridine (4-aminopyridine), the active ingredient in dalfampridine extended-release tablets What should I tell my doctor before taking dalfampridine extended-release tablets ?

Before you take dalfampridine extended-release tablets , tell your doctor if you: have any other medical conditions are taking compounded 4-aminopyridine (fampridine, 4-AP) are taking any other medicines, including over-the-counter medicines such as cimetidine are pregnant or plan to become pregnant. It is not known if dalfampridine extended-release tablets will harm your unborn baby. are breast-feeding or plan to breast-feed. It is not known if dalfampridine passes into your breast milk.

Talk with your healthcare provider about the best way to feed your baby if you take dalfampridine extended-release tablets. Tell your doctor about all the medicines you take, including prescription and non-prescription medicines, vitamins and herbal supplements. Know the medicines you take.

Keep a list of them and show it to your doctor and pharmacist when you get a new medicine. How should I take dalfampridine extended-release tablets ? Take dalfampridine extended-release tablets exactly as your doctor tells you to take it.

Do not change your dose of dalfampridine extended-release tablets. Take one tablet of dalfampridine extended-release tablet 2 times each day about 12 hours apart. Do not take more than 2 tablets of dalfampridine extended-release tablets in a 24-hour period.

Take dalfampridine extended-release tablets whole. Do not break, crush, chew or dissolve dalfampridine extended-release tablets before swallowing. If you cannot swallow dalfampridine extended-release tablets whole, tell your doctor.

Dalfampridine extended-release tablet is released slowly over time. If the tablet is broken, the medicine may be released too fast. This can raise your chance of having a seizure.

Dalfampridine extended-release tablets can be taken with or without food. If you miss a dose of dalfampridine extended-release tablets, do not make up the missed dose. Do not…

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

Medicare Part D spend CMS · PART D · 2026 (Q1)

Medicare Part D (outpatient prescription) spending for Ampyra (matched by generic name) — 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 Ampyra. CMS lists 2 products for this generic; we show the highest-spend one. 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
$8.79M
Claims incl. refills
1.5K
Beneficiaries
710
Spend / beneficiary
$12,378.64
Spend / claim
$5,999.20
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.

About this NDC listing & data coverage

Finished prescription product
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) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ 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 ✓ Available
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.
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 form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by Bryant Ranch Prepack. Listing status can change — the directory data on this page refreshes weekly.
Who lists this product with the FDA?
Bryant Ranch Prepack 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.
← 72162-2458-01 · Bryant 72162-2460-01 · Bryant →
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.