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Nascobal cyanocobalamin 500 ug Spray, 4-count — NDC 49884-0270-82 package photo

Nascobal cyanocobalamin 500 ug Spray, 4-count

by Par Health USA, LLC · 4 SPRAY in 1 CARTON (49884-270-82)
NDC 49884-0270-82
🏷️ FDA NDC (as labeled) 49884-270-82 billing pads the product segment with a zero
Rx only Brand On market Non-controlled
🗂️ Data synced Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →
⚠️
Other active recalls for Cyanocobalamin (different manufacturers) — 2 · tap to view
These affect other manufacturers’ products for the same ingredient — not necessarily the exact NDC on this page.
Class II · Jul 24, 2026 — Presence of Particulate Matter: Product contaminated with particulate matter identified as hair, glass and/or paraformaldehyde (American Regent, Inc.) · FDA recall D-0793-2026
Class II · Jul 24, 2026 — Presence of Particulate Matter: Product contaminated with particulate matter identified as hair, glass and/or paraformaldehyde (American Regent, Inc.) · FDA recall D-0792-2026
Each entry is an official FDA enforcement report — look up any recall number in the FDA recall database ↗

🆔 Identity & classification

FDA NDC (as labeled) 49884-270-82
Product NDC 49884-270
11-digit billing NDC 49884027082
NCPDP billing unit EA — each (per item)
RxCUI 861113, 861115
UNII P6YC3EG204
UPC 0349884270148
Application # NDA021642
SPL Set ID 697e0e52-c01b-4b53-9994-f79c46eb6b4f
Established class (EPC) Vitamin B12
Chemical class Vitamin B 12
DEA schedule Non-controlled
Marketing category NDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2009-08-13
Marketing end 2026-12-31
Route NASAL
Dosage form SPRAY
Substance CYANOCOBALAMIN
GPI-14 82100010002020
GPI class Nascobal
GCN Seq No 072532
GCN 36786
HICL code 001053
Ingredient (HICL) Cyanocobalamin (Vitamin B-12)
HIC1 code C
Therapeutic class — broad (HIC1) Electrolyte Balance/Metabolism/Nutrition
HIC2 code C6
Therapeutic class — intermediate (HIC2) Vitamins
HIC3 code C6L
Therapeutic class — specific (HIC3) Vitamin B12 Preparations
AHFS code 88:08.00.00
AHFS class Vitamin B Complex
FDB label name NASCOBAL 500 MCG NASAL SPRAY
FDB brand name Nascobal
Legend status F — Federal legend — prescription drug or device
Why two NDCs? The FDA registers this code as 49884-270-82 — 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 → 49884-0270-82. 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 Vitamin B12 class.

Pharmacologic class Vitamin B12
Drug family (ATC) Vitamin B12 (cyanocobalamin and analogues)
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.

🏭 Manufacturer & labeler

LabelerPar Health USA, LLC
Application holderENDO OPERATIONS LTD
FDA applicationNDA021642 (NDA)
Labeler code49884
First marketedAug 2009
Product typeHuman Prescription Drug
Portfolio210 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.

🩺 Clinical

Label name NASCOBAL 500 MCG NASAL SPRAY Ingredient Cyanocobalamin (Vitamin B-12)
📖 What it is MedlinePlus · NLM

Cyanocobalamin nasal gel is used to prevent a lack of vitamin B12 that may be caused by any of the following: pernicious anemia (lack of a natural substance needed to absorb vitamin B12 from the intestine); certain diseases, infections or medications that decrease the amount of vitamin B12 absorbed from food; or a vegan diet (strict vegetarian diet that does not allow any animal products including eggs and dairy products). Lack of vitamin B12 can cause anemia (condition in which the red blood cells do not bring enough oxygen to the organs) and permanent damage to the nerves. This anemia must b...

Read the full MedlinePlus article ↗
📗 Our plain-language guide HelloPharmacist
  • Great question. Some people can't absorb B12 properly through the gut — especially those with pernicious anemia, where the stomach doesn't make a protein called intrinsic factor th...
  • Why do I need a nasal spray for vitamin B12 — can't I just take a pill?
  • Yes, timing does matter here. You should use it at least one hour before or one hour after eating or drinking anything hot. Hot foods and liquids can cause your nose to run, and th...
  • Does it matter when I use the spray — like, with meals or at a certain time of day?
📖 Read our full Cyanocobalamin Nasal Gel 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.

🧪 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 F5UM2KM3W7
    Benzalkonium chloride is a chemical compound that works as a preservative and antimicrobial agent in medications. It prevents bacterial and fungal growth in liquid formulations to keep the product safe during storage and use.
  • UNII 2968PHW8QP
    A weak organic acid derived from citrus fruits or made through fermentation. It works as a buffer to control pH, a preservative to extend shelf life, and a flavoring agent in medications.
  • UNII PDC6A3C0OX
    Glycerin is a clear, thick liquid derived from plant oils or fats. It acts as a humectant to retain moisture, a sweetener, and a solvent in medications.
  • UNII 1Q73Q2JULR
    Sodium citrate is a salt derived from citric acid. It works as a buffer to maintain the medicine's pH level and may also help improve taste or act as a preservative in the formulation.

4 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 DailyMedingredient 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.

💲 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 eaPer package
Retail pharmacies payNADAC · weekly $171.739 $686.96 / 4 sprays
Medicaid paysCMS SDUD · 12 mo $1,321.15 $5,284.58 / 4 sprays
Medicare drug plans payPart D · quarterly No Part D plan price is available for this NDC in our data.
NADAC price history (per ea) — tap or hover for the price & month
May 2021 Jan 2022 Oct 2023 Jul 2025 $171.739 $154.324
▲ Up 11% over the last 4 months.
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

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
cyanocobalamin 500 ug 45802-0491-84 Padagis 4 bottles $98.834 AB Availability likely save 42%
Nascobal 500 ugthis 49884-0270-82 Par 4 sprays $171.739 Availability likely
Cyanocobalamin 500 ug 43386-0237-60 Lupin 4 sprays AB FDA listed
About this product: this is the brand-name version. FDA-approved generic versions are listed, and recent pricing/market data suggests they may be available.
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

🏛️
2009
On the market since
Aug 2009
📍
2026
Currently FDA-listed
17 years listed
🔓
·
Generic versions listed
see equivalents
Generic appears available

FDA-approved generic versions are listed, and recent pricing/market data suggests they may be available — see Therapeutic equivalents.

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.

🗺️ Medicaid utilization & spend

📍 This exact package only: Medicaid data is reported per full 11-digit NDC — labeler, product and pack size — so every number here is for 49884-0270-82, not the drug overall. Other pack sizes report separately.
💊 Pharmacy benefit only: These are Medicaid outpatient pharmacy claims, billed by NDC. They exclude the medical benefit — clinic- or hospital-administered drugs billed under HCPCS J-codes — so drugs used mostly that way (e.g. Avastin, Lucentis, Keytruda) can look low or missing here. That’s expected, not an error.
📅 Q1 2025 – Q4 2025 · 4 quarters of data
ⓘ The newest quarter is usually incomplete when first published; states restate recent quarters in later CMS releases, so the latest figures typically revise upward. State coverage-policy changes can also shift quarter-to-quarter totals.
Prescriptions last 4 qtrs
192
Units reimbursed last 4 qtrs
96
Gross reimbursed last 4 qtrs
$126.8K
Avg / prescription
$660.57
Avg / unit
$1,324.60
Latest quarter Q4 2025
50Rx
Medicaid pays / ea
$1,324.60
gross reimbursed
vs
NADAC / ea
$171.74
acquisition cost
=
Spread
+$1,152.86
+671% vs cost
What Medicaid paid per ea (before rebates; includes the pharmacy’s dispensing fee) compared with NADAC — the average price pharmacies pay to buy the drug. A positive spread means Medicaid reimbursed more than the purchase price, before manufacturer rebates.
Fee-for-service vs managed care
100% FFS
Fee-for-service · 192 Rx Managed care · 0 Rx
State Medicaid map
Alaska: no data reported AK Maine: no data reported ME Washington: no data reported WA Idaho: no data reported ID Montana: no data reported MT North Dakota: no data reported ND Minnesota: no data reported MN Wisconsin: no data reported WI Michigan: no data reported MI New York: 96 units · 0.5 per 100k residents NY Vermont: no data reported VT New Hampshire: no data reported NH Oregon: no data reported OR Nevada: no data reported NV Wyoming: no data reported WY South Dakota: no data reported SD Iowa: no data reported IA Illinois: no data reported IL Indiana: no data reported IN Ohio: no data reported OH Pennsylvania: no data reported PA New Jersey: no data reported NJ Massachusetts: no data reported MA California: no data reported CA Utah: no data reported UT Colorado: no data reported CO Nebraska: no data reported NE Missouri: no data reported MO Kentucky: no data reported KY West Virginia: no data reported WV Virginia: no data reported VA Maryland: no data reported MD Connecticut: no data reported CT Rhode Island: no data reported RI Arizona: no data reported AZ New Mexico: no data reported NM Kansas: no data reported KS Arkansas: no data reported AR Tennessee: no data reported TN North Carolina: no data reported NC South Carolina: no data reported SC Delaware: no data reported DE Oklahoma: no data reported OK Louisiana: no data reported LA Mississippi: no data reported MS Alabama: no data reported AL Georgia: no data reported GA D.C.: no data reported DC Hawaii: no data reported HI Texas: no data reported TX Florida: no data reported FL
Units reimbursed · per 100k residents
0.50.5
gray = no data reported
Colors are per 100,000 residents, so big states don’t automatically dominate. Tap or hover a state for its actual totals.
Tap or hover a state
…for its Medicaid breakdown
🏆 Top states by units · per 100k residents
1 New York 0.5 /100k
National units — by quarter
💵 About the dollar figures: “reimbursed” is what Medicaid paid pharmacies before confidential manufacturer rebates, so the program’s real net cost is lower than these numbers. Fee-for-service and managed-care claims are combined unless split above. Source: CMS State Drug Utilization Data; per-100k rates use 2023 Census population estimates.

🔬 Reported adverse events (FAERS)

Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for Nascobal (this brand).

Top reported reactions

Fatigue3,333
Nausea2,738
Headache2,382
Pain2,218
Diarrhoea2,200
Dyspnoea2,107
Vomiting1,803

Age at onset

Neonate9
Infant6
Child9
Adolescent25
Adult3,331
Elderly3,631

Reporter sex

32,749 reports
Male · 35%
Female · 65%
Unknown · 0%

Serious outcomes

Hospitalization13,234
Death3,282
Life-threatening2,160
Reports over time (by year) — tap or hover for the count & year
2019 2021 2023 2026 3,254 0
Most recent year is provisional (FAERS lags ~3 months).
Where does this data come from?
Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.

📦 Packaging — all sizes for this product

Package NDCDescription Marketing startStatus
49884-0270-82 You're viewing this 4 SPRAY in 1 CARTON (49884-270-82) 2009-08-13 Active

📄 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 ~1 min read

1 INDICATIONS AND USAGE NASCOBAL is indicated for: Vitamin B 12 maintenance therapy in adult patients with pernicious anemia who are in remission following intramuscular vitamin B 12 therapy and who have no nervous system involvement Treatment of adult patients with dietary, drug-induced, or malabsorption-related vitamin B 12 deficiency not due to pernicious anemia Prevention of vitamin B 12 deficiency in adult patients with vitamin B 12 requirements in excess of normal Limitations of Use NASCOBAL should not be used for the vitamin B 12 absorption test (Schilling test).

In patients with correctible or temporary causes of vitamin B 12 deficiency, the benefit of continued long-term use of NASCOBAL following adequate correction of vitamin B 12 deficiency and underlying disease has not been established. The effectiveness of NASCOBAL in patients with active symptoms of nasal congestion, allergic rhinitis or upper respiratory infection has not been determined. Treatment with NASCOBAL should be deferred until symptoms have subsided.

NASCOBAL is a vitamin B 12 indicated for: Vitamin B12 maintenance therapy in adult patients with pernicious anemia who are in remission following intramuscular vitamin B12 therapy and who have no nervous system involvement (1) Treatment of adult patients with dietary, drug-induced, or malabsorption-related vitamin B12 deficiency not due to pernicious anemia (1) Prevention of vitamin B12 deficiency in adult patients with vitamin B12 requirements in excess of normal (1) Limitations of Use: Should not be used for the vitamin B12 absorption test (Schilling test).

(1) In patients with correctible or temporary causes of vitamin B12 deficiency the benefit of continued long-term use following correction of vitamin B 12 deficiency and underlying disease has not been established. (1) In patients with active symptoms of nasal congestion, allergic rhinitis or upper respiratory infection effectiveness has not been established. (1)

⏱️ Dosage and Administration ~2 min read

2 DOSAGE AND ADMINISTRATION Prior to treatment, obtain hematocrit, reticulocyte count, vitamin B 12 , folate, and iron levels. (2.1) The recommended initial dose is one spray (500 mcg) in one nostril once weekly. (2.2) Administer at least one hour before or one hour after ingestion of hot foods or liquids.

(2.2) Monitor serum B12 levels periodically.Obtain a serum B12 level and peripheral blood count one month after treatment initiation, then subsequently at intervals of 3 to 6 months. (2.3) If serum levels of B12 decline after one month of treatment, consider increasing the dose. Assess serum B12 level one month after each dose adjustment.If serum B12 levels are persistently low, consider alternative therapy (e.g., intramuscular or subcutaneous vitamin B12 therapy).

(2.3) See Full Prescibing Information to see what other therapies should be administered with NASCOBAL. (2.4)

2.1Testing and Other Considerations Prior to Dosing Prior to treatment, obtain hematocrit, reticulocyte count, vitamin B 12 , folate, and iron levels [see Dosage and Administration (2.4) ] . Consider the potential for concomitant drugs to interfere with vitamin B 12 and folate diagnostic blood assays [see Drug Interactions (7) ] . In patients with suspected cobalamin hypersensitivity, consider administering an intradermal test dose of parenteral vitamin B 12 prior to use of NASCOBAL [see Warnings and Precautions (5.2) ] .

2.2Recommended Dosage The recommended initial dose of NASCOBAL is one spray (500 mcg) administered in ONE nostril once weekly. Administer NASCOBAL at least one hour before or one hour after ingestion of hot foods or liquids since hot foods may cause nasal secretions and a resulting loss of medication. Defer use of NASCOBAL in patients with nasal congestion, allergic rhinitis, or upper respiratory infections until after symptoms have subsided.

2.3Monitoring, Dosage Modifications, and Treatment Duration Monitoring for Response and Safety Monitor serum B 12 levels periodically during therapy to establish adequacy of therapy. Obtain a serum B 12 level and peripheral blood count one month after treatment initiation, then subsequently at intervals of 3 to 6 months [see Warnings and Precautions (5.3) ] . Dosage Modifications If serum levels of B 12 decline after one month of treatment with NASCOBAL, consider increasing the dose.

Assess serum B 12 level one month after each dose adjustment. If serum B 12 levels are persistently low, consider alternative therapy (e.g., intramuscular or subcutaneous vitamin B 12 therapy). Treatment Duration In patients whose underlying cause of vitamin B 12 deficiency has been corrected and are deemed no longer at risk for vitamin B 12 deficiency, discontinue NASCOBAL.

The safety and effectiveness of continued long-term use in these individuals has not been established. In patients with pernicious anemia, continue appropriate vitamin B 12 treatment indefinitely.

2.4Administration of NASCOBAL with Other Therapy NASCOBAL should be administered with other therapy(ies) in: Patients with concurrent folate and vitamin B 12 deficiency:Administer folic acid in addition to NASCOBAL Patients with concurrent iron and vitamin B 12 deficiency:Administer iron in addition to NASCOBAL Patients with correctible causes of vitamin B 12 deficiency:Consider measures to treat the underlying condition associated with vitamin B 12 deficiency in addition to treatment with NASCOBAL

💊 Dosage Forms and Strengths 31 words

3 DOSAGE FORMS AND STRENGTHS Nasal spray: 500 mcg/0.1 mL (per actuation), packaged in a single-use device containing 0.125 mL of solution Nasal spray: 500 mcg cyanocobalamin/0.1 mL (per actuation) (3)

Contraindications 53 words

4 CONTRAINDICATIONS NASCOBAL is contraindicated in patients with hypersensitivity to cobalt and/or vitamin B 12 or any of its excipients [see Warnings and Precautions (5.2) ] . Anaphylactic shock and death have been reported after parenteral vitamin B12 administration in sensitive patients. • Hypersensitivity to cobalt, vitamin B 12 or any excipients (4)

⚠️ Warnings and Cautions ~2 min read

5 WARNINGS AND PRECAUTIONS • Severe Optic Atrophy in Patients with Leber’s Disease : Patients with early Leber’s disease who were treated with vitamin B 12 suffered severe and swift optic atrophy. NASCOBAL is not recommended for use in these patients.(5.1) • Anaphylactic Reactions: Anaphylactic shock and death have been reported after parenteral vitamin B 12 administration. If patients are to start NASCOBAL before having tolerated cyanocobalamin parenterally, consider administering an intradermal test dose of parenteral vitamin B 12 to patients suspected of cyanocobalamin hypersensitivity.

(2.1,5.2) • Masking of Folate Deficiency with Vitamin B 12 Use: Doses of vitamin B 12 exceeding 10 mcg daily may produce hematologic response in patients with folate deficient megaloblastic anemia and may therefore mask a previously unrecognized folate deficiency. Assess both vitamin B 12 and folate levels prior to initiating therapy with NASCOBAL or with folic acid. (5.3) • Hypokalemia and Thrombocytosis Due to Intense Treatment of Megaloblastic Anemia: Hypokalemia and sudden death may occur in severe megaloblastic anemia that is treated intensely with vitamin B 12 .

Monitor serum potassium levels and platelet count during therapy. (5.4) • Unmasking of Polycythemia Vera: Vitamin B 12 deficiency may suppress the signs of polycythemia vera. Treatment with NASCOBAL may unmask this condition.

Patients exhibiting clinical or hematologic response consistent with polycythemia vera should be referred for further evaluation. (5.5)

5.1Severe Optic Atrophy in Patients with Leber’s Disease Patients with early Leber’s disease (hereditary optic nerve atrophy) who were treated with vitamin B 12 suffered severe and swift optic atrophy. Cyanocobalamin products, including NASCOBAL, is not recommended for use in patients with Leber’s optic atrophy. For patients with Leber’s disease requiring vitamin B 12 , consider alternative therapy (e.g., hydroxocobalamin) for B 12 supplementation.

5.2Anaphylactic Reactions Anaphylactic shock and death have been reported after parenteral vitamin B 12 administration. If patients are to start NASCOBAL before having tolerated cyanocobalamin parenterally, consider administering an intradermal test dose of parenteral vitamin B 12 to patients suspected of cyanocobalamin hypersensitivity [see Dosage and Administration (2.1) ] .

5.3Masking of Folate Deficiency with Vitamin B12 Use Doses of vitamin B 12 exceeding 10 mcg daily may produce hematologic response in patients with folate deficient megaloblastic anemia and may therefore mask a previously unrecognized folate deficiency. Vitamin B 12 is not a substitute for folic acid [see Dosage and Administration (2.4) ] . Assess both vitamin B 12 and folate levels prior to initiating therapy with vitamin B 12, including NASCOBAL, or with folic acid [see Dosage and Administration (2.1) ] .

5.4Hypokalemia and Thrombocytosis Due to Intense Treatment of Megaloblastic Anemia Hypokalemia and sudden death may occur in severe megaloblastic anemia that is treated intensely with vitamin B 12 . Hypokalemia and thrombocytosis can occur upon conversion of severe megaloblastic anemia to normal erythropoiesis with vitamin B 12 therapy. Therefore, serum potassium levels and platelet count should be monitored carefully during therapy [see Dosage and Administration (2.3) ] .

5.5Unmasking of Polycythemia Vera Vitamin B 12 deficiency may suppress the signs of polycythemia vera. Treatment with vitamin B 12 may unmask this condition. Patients exhibiting clinical or hematologic response consistent with polycythemia vera should be referred for further evaluation.

🤒 Adverse Reactions ~1 min read

6 ADVERSE REACTIONS The following serious adverse reactions are described elsewhere in the labeling: Severe Optic Atrophy in Patients with Leber’s Disease [see Warnings and Precautions (5.1) ] . Anaphylactic Reactions [see Warnings and Precautions (5.2) ] . Hypokalemia and Thrombocytosis Due to Intense Treatment of Megaloblastic Anemia [see Warnings and Precautions (5.4) ] .

The most common adverse reactions (≥ 4%) were infection, headache, glossitis, paresthesia, asthenia, nausea and rhinitis (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Endo at 1-800-828-9393 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling

6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The adverse reactions described in Table 1 below are based on data from an eight week cross over trial in which vitamin B12 deficient patients in hematologic remission received one vitamin B12 intramuscular injection (N=25) and then received once weekly intranasal administration of another nasal cyanocobalamin formulation (N=24) for 4 weeks.

Table 1. Adverse Reactions Following Intranasal or Intramuscular Administration of Cyanocobalamin In Vitamin B12 Deficient Patients in Hematologic Remission Adverse Reaction Number of Patients (%) Another Cyanocobalamin Nasal Formulation, 500 mcg (n=24) Intramuscular Cyanocobalamin*, 100 mcg (n=25) Infection a 3 (13) 3 (12) Headache 1 (4) 5 (20) Asthenia 1 (4) 4 (16) Nausea 1 (4) 1 (4) Glossitis 1 (4) 0 (0) Paresthesia 1 (4) 1 (4) Rhinitis 1 (4) 2 (8) a Sore throat, common cold * The data are not an adequate basis for comparison of rates between the study drug and the active control

🔄 Drug Interactions 39 words

7 DRUG INTERACTIONS Chloramphenicol may decrease the efficacy of NASCOBAL when used for treatment of anemia. If NASCOBAL is used for the treatment of anemia concomitantly with chloramphenicol, monitor for reduced efficacy and if needed, consider an alternative therapy

👥 Use in Specific Populations 196 words

8 USE IN SPECIFIC POPULATIONS See Patient Counseling Information.

8.1Pregnancy Risk Summary The limited available data on NASCOBAL in pregnant women are insufficient to inform a drug-associated risk of adverse developmental outcomes. However, vitamin B12 is an essential vitamin and requirements are increased during pregnancy. Animal reproduction studies have not been conducted with vitamin B 12 .

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.

8.2Lactation Risk Summary Vitamin B 12 is present in the milk of lactating women in concentrations which approximate the mother’s vitamin B 12 blood level. Vitamin B 12 does not appear to pose more than a minimal risk to breastfeeding children.

8.4Pediatric Use Safety and effectiveness have not been established in pediatric patients.

8.5Geriatric Use Clinical studies of NASCOBAL did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients.

🤰 Pregnancy 89 words

8.1Pregnancy Risk Summary The limited available data on NASCOBAL in pregnant women are insufficient to inform a drug-associated risk of adverse developmental outcomes. However, vitamin B12 is an essential vitamin and requirements are increased during pregnancy. Animal reproduction studies have not been conducted with vitamin B 12 .

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.

🧒 Pediatric Use 13 words

8.4Pediatric Use Safety and effectiveness have not been established in pediatric patients.

🧓 Geriatric Use 43 words

8.5Geriatric Use Clinical studies of NASCOBAL did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients.

🧬 Clinical Pharmacology ~2 min read

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action Vitamin B 12 can be converted to coenzyme B 12 in tissues, and as such is essential for conversion of methylmalonate to succinate and synthesis of methionine from homocysteine, a reaction which also requires folate. In the absence of coenzyme B 12 , tetrahydrofolate cannot be regenerated from its inactive storage form, 5-methyltetrahydrofolate, and a functional folate deficiency occurs. Vitamin B 12 also may be involved in maintaining sulfhydryl (SH) groups in the reduced form required by many SH-activated enzyme systems.

Through these reactions, vitamin B 12 is associated with fat and carbohydrate metabolism and protein synthesis.

12.2Pharmacodynamics Parenteral (intramuscular) administration of vitamin B 12 completely reverses the megaloblastic anemia and GI symptoms of vitamin B 12 deficiency; the degree of improvement in neurologic symptoms depends on the duration and severity of the lesions, although progression of the lesions is immediately arrested. In pernicious anemia patients, once weekly intranasal dosing with 500 mcg B 12 gel resulted in a consistent increase in pre-dose serum B 12 levels during one month of treatment (p < 0.003) above that seen one month after 100 mcg intramuscular dose (Figure 2).

Figure 2. Vitamin B 12 Serum Trough Levels After Intramuscular Solution (IM) of 100 mcg and Nasal Gel (IN) Administration of 500 mcg Cyanocobalamin After Weekly Doses. Image-2

12.3Pharmacokinetics Absorption Vitamin B 12 is bound to intrinsic factor during transit through the stomach; separation occurs in the terminal ileum in the presence of calcium, and vitamin B 12 enters the mucosal cell for absorption. It is then transported by the transcobalamin binding proteins. A small amount (approximately 1% of the total amount ingested) is absorbed by simple diffusion, but this mechanism is adequate only with very large doses.

A three way crossover study in 25 fasting healthy subjects was conducted to compare the bioavailability of the B 12 nasal spray to the B 12 nasal gel and to evaluate the relative bioavailability of the nasal formulations as compared to the intramuscular injection. The peak concentrations after administration of intranasal spray were reached in 1.25 +/- 1.9 hours. The mean peak plasma concentration (C max ) of B 12 , obtained after baseline correction, following administration of intranasal spray were 748 +/-549 pg/mL.

The bioavailability of the B 12 nasal spray was found to be 10% less than the B 12 nasal gel. Distribution In the blood, B 12 is bound to transcobalamin II, a specific B-globulin carrier protein, and is distributed and stored primarily in the liver and bone marrow. Elimination About 3-8 mcg of B 12 is secreted into the GI tract daily via the bile and undergoes some enterohepatic recycling; in normal subjects with sufficient intrinsic factor, all but about 1 mcg is reabsorbed.

When B 12 is administered in doses which saturate the binding capacity of plasma proteins and the liver, the unbound B 12 is rapidly eliminated in the urine. Retention of B 12 in the body is dose-dependent. About 80-90% of an intramuscular dose up to 50 mcg is retained in the body; this percentage drops to 55% for a 100 mcg dose, and decreases to 15% when a 1000 mcg dose is given.

🧬 Mechanism of Action 101 words

12.1Mechanism of Action Vitamin B 12 can be converted to coenzyme B 12 in tissues, and as such is essential for conversion of methylmalonate to succinate and synthesis of methionine from homocysteine, a reaction which also requires folate. In the absence of coenzyme B 12 , tetrahydrofolate cannot be regenerated from its inactive storage form, 5-methyltetrahydrofolate, and a functional folate deficiency occurs. Vitamin B 12 also may be involved in maintaining sulfhydryl (SH) groups in the reduced form required by many SH-activated enzyme systems.

Through these reactions, vitamin B 12 is associated with fat and carbohydrate metabolism and protein synthesis.

📦 How Supplied / Storage and Handling 65 words

16 HOW SUPPLIED/STORAGE AND HANDLING NASCOBAL is a nasal spray available in a dosage strength of 500 mcg cyanocobalamin/0.1 mL (per actuation). It is supplied in boxes of 4 single-use nasal spray devices and a package insert (NDC 49884-270-82). Protect from light. Keep covered in carton until ready to use. Store upright at controlled room temperature 15°C to 30°C (59°F to 86°F). Protect from freezing.

📋 Description 199 words

11 DESCRIPTION Cyanocobalamin is a synthetic form of vitamin B 12 . The chemical name is 5,6-dimethyl-benzimidazolyl cyanocobamide. The cobalt content is 4.35%.

The molecular formula is C 63 H 88 CoN 14 O 14 P, which corresponds to a molecular weight of 1355.38 and the following structural formula: Figure 1. Nascobal Chemical Structure Cyanocobalamin occurs as dark red crystals or orthorhombic needles or crystalline red powder. It is very hygroscopic in the anhydrous form, and sparingly to moderately soluble in water (1:80).

Its pharmacologic activity is destroyed by heavy metals (iron) and strong oxidizing or reducing agents (vitamin C), but not by autoclaving for short periods of time (15-20 minutes) at 121°C. The vitamin B 12 coenzymes are very unstable in light. NASCOBAL (cyanocobalamin) nasal spray is a solution of cyanocobalamin, USP (vitamin B 12 ) for administration as a spray to the nasal mucosa.

Each single-use device of NASCOBAL NASAL SPRAY contains 0.125 mL of a 500 mcg/0.1 mL solution of cyanocobalamin with, benzalkonium chloride in purified water, citric acid, glycerin and sodium citrate. The spray solution has a pH between 4.5 and 5.5. Each spray delivers an average of 500 mcg of cyanocobalamin per actuation.

Image-1

💬 Information for Patients 196 words

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Instructions for Use). Importance of Adherence to Therapy and Follow-up Advise patients of the importance of adhering to therapy to prevent the development, recurrence, or progression of anemia and the development or progression of neurological manifestations. Patients experiencing symptomatic nasal congestion, allergic rhinitis or an upper respiratory infection should be advised to defer treatment with NASCOBAL until symptoms have subsided.

Counsel patients on the importance of returning for follow-up blood tests every 3 to 6 months to confirm adequacy of therapy [see Dosage and Administration (2.3)] . Specific Instructions for Administration Advise patients to administer NASCOBAL at least one hour before or one hour after ingestion of hot foods or liquids since hot foods may cause nasal secretions and a resulting loss of medication. Use of Nasal Spray Device Provide patients with instructions on nasal administration of NASCOBAL.

In addition to alerting patients to the instructions contained in the Instructions For Use and instructions supplied on each carton, demonstrate procedures for use to each patient. Manufactured for: Endo USA Malvern, PA 19355 © 2024 Endo, Inc. or one of its affiliates. Revised: 03/2024

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