Label: ORPHENADRINE CITRATE injection

  • NDC Code(s): 0641-6182-01, 0641-6182-10
  • Packager: West-Ward Pharmaceuticals Corp.
  • Category: HUMAN PRESCRIPTION DRUG LABEL
  • DEA Schedule: None
  • Marketing Status: Abbreviated New Drug Application

Drug Label Information

Updated December 10, 2018

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  • SPL UNCLASSIFIED SECTION

    Rx only

  • DESCRIPTION

    Orphenadrine citrate is the citrate salt of orphenadrine (±)-N,N-dimethyl-2-[(o-methyl-α-phenylbenzyl)oxy]-ethylamine citrate (1:1). It occurs as a white, crystalline powder having a bitter taste. It is practically odorless; sparingly soluble in water, slightly soluble in alcohol.

    Each vial contains 60 mg of orphenadrine citrate in aqueous solution. Each vial also contains: sodium metabisulfite, 2 mg; sodium chloride, 5.8 mg; sodium hydroxide, to adjust pH; and water for injection, q.s. to 2 mL. The structural formula is:

    Structural Formula

    C18H23NO•C6H8O7             MW 461.50

  • CLINICAL PHARMACOLOGY

    The mode of therapeutic action has not been clearly identified, but may be related to its analgesic properties. Orphenadrine citrate does not directly relax tense muscles in man. Orphenadrine citrate also possesses anticholinergic actions.

  • INDICATIONS AND USAGE

    Orphenadrine citrate is indicated as an adjunct to rest, physical therapy, and other measures for the relief of discomfort associated with acute painful musculoskeletal conditions.

  • CONTRAINDICATIONS

    Contraindicated in patients with glaucoma, pyloric or duodenal obstruction, stenosing peptic ulcers, prostatic hypertrophy or obstruction of the bladder neck, cardio-spasm (megaesophagus) and myasthenia gravis.

    Contraindicated in patients who have demonstrated a previous hypersensitivity to the drug.

  • WARNINGS

    Some patients may experience transient episodes of light-headedness, dizziness or syncope. Orphenadrine citrate may impair the ability of the patient to engage in potentially hazardous activities such as operating machinery or driving a motor vehicle; ambulatory patients should therefore be cautioned accordingly.

    Orphenadrine citrate injection contains sodium metabisulfite, a sulfite that may cause allergic-type reactions including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than nonasthmatic people.

  • PRECAUTIONS

    Confusion, anxiety and tremors have been reported in few patients receiving propoxyphene and orphenadrine concomitantly. As these symptoms may be simply due to an additive effect, reduction of dosage and/or discontinuation of one or both agents is recommended in such cases.

    Orphenadrine citrate should be used with caution in patients with tachycardia, cardiac decompensation, coronary insufficiency, cardiac arrhythmias.

    Safety of continuous long-term therapy with orphenadrine has not been established. Therefore, if orphenadrine is prescribed for prolonged use, periodic monitoring of blood, urine and liver function values is recommended.

    Pregnancy

    Teratogenic Effects

    Pregnancy Category C
    Animal reproduction studies have not been conducted with orphenadrine. It is also not known whether orphenadrine can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Orphenadrine should be given to a pregnant woman only if clearly needed.

    Pediatric Use

    Safety and effectiveness in children have not been established; therefore, this drug is not recommended for use in the pediatric age group.

  • ADVERSE REACTIONS

    Adverse reactions of orphenadrine are mainly due to the mild anticholinergic action of orphenadrine, and are usually associated with higher dosage. Dryness of the mouth is usually the first adverse effect to appear. When the daily dose is increased, possible adverse effects include: tachycardia, palpitation, urinary hesitancy or retention, blurred vision, dilatation of pupils, increased ocular tension, weakness, nausea, vomiting, headache, dizziness, constipation, drowsiness, hypersensitivity reactions, pruritus, hallucinations, agitation, tremor, gastric irritation, and rarely urticaria and other dermatoses. Infrequently, an elderly patient may experience some degree of mental confusion. These adverse reactions can usually be eliminated by reduction in dosage. Very rare cases of aplastic anemia associated with the use of orphenadrine tablets have been reported. No causal relationship has been established.

    Rare instances of anaphylactic reaction have been reported associated with the intramuscular injection of orphenadrine citrate.

  • DRUG ABUSE AND DEPENDENCE

    Orphenadrine has been chronically abused for its euphoric effects. The mood elevating effects may occur at therapeutic doses of orphenadrine.

  • OVERDOSAGE

    Orphenadrine is toxic when overdosed and typically induces anticholinergic effects. In a review of orphenadrine toxicity, the minimum lethal dose was found to be 2 to 3 grams for adults; however, the range of toxicity is variable and unpredictable. Treatment for orphenadrine overdose is evacuation of stomach contents (when necessary), charcoal at repeated doses, intensive monitoring, and appropriate supportive treatment of any emergent anticholinergic effects.

  • DOSAGE AND ADMINISTRATION

    Adults - One 2 mL vial (60 mg) intravenously or intramuscularly; may be repeated every 12 hours. Relief may be maintained by one (100 mg) orphenadrine citrate tablet twice daily.

    Parenteral drug products should be inspected visually for particulate matter, whenever solution and container permit.

  • ​HOW SUPPLIED

    Orphenadrine Citrate Injection, USP is supplied as follows:

    Cartons of 10 (NDC 0641-6182-10) 2 mL vials, each vial containing 60 mg of orphenadrine citrate in aqueous solution.

    Storage

    Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature].

    Protect from light.

    Single dose vial. Discard unused portion.

    To report SUSPECTED ADVERSE REACTIONS, contact West-Ward Pharmaceuticals Corp. at 1-877-845-0689, or the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

    For Product Inquiry call 1-877-845-0689.

    Manufactured by:

    WW logo 

    WEST-WARD

    PHARMACEUTICALS

    Eatontown, NJ 07724 USA

    Revised February 2016

    462-734-00

  • PRINCIPAL DISPLAY PANEL - CONTAINER

    NDC 0641-6182-01     Rx only
    Orphenadrine
    Citrate Injection, USP
    60 mg/2 mL
    (30 mg/mL)
    FOR IV or IM USE
    Discard unused portion
    2 mL Single Dose Vial

    Orphenadrine 2 mL vial container label
  • PRINCIPAL DISPLAY PANEL -SHELF PACK

    NDC 0641-6182-10      Rx only
    Orphenadrine
    Citrate Injection, USP
    60 mg/2 mL
    (30 mg/mL)
    For INTRAVENOUS or INTRAMUSCULAR Use
    10 x 2 mL Single Dose Vials

    Orphenadrine shelfpack label
  • SERIALIZATION IMAGE

    Layout 1

  • INGREDIENTS AND APPEARANCE
    ORPHENADRINE CITRATE 
    orphenadrine citrate injection
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0641-6182
    Route of AdministrationINTRAMUSCULAR, INTRAVENOUS
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    ORPHENADRINE CITRATE (UNII: X0A40N8I4S) (ORPHENADRINE - UNII:AL805O9OG9) ORPHENADRINE CITRATE60 mg  in 2 mL
    Inactive Ingredients
    Ingredient NameStrength
    SODIUM CHLORIDE (UNII: 451W47IQ8X) 5.8 mg  in 2 mL
    SODIUM HYDROXIDE (UNII: 55X04QC32I)  
    SODIUM METABISULFITE (UNII: 4VON5FNS3C) 2 mg  in 2 mL
    WATER (UNII: 059QF0KO0R)  
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0641-6182-1010 in 1 BOX04/28/2003
    1NDC:0641-6182-012 mL in 1 VIAL; Type 0: Not a Combination Product
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    ANDAANDA04046304/28/2003
    Labeler - West-Ward Pharmaceuticals Corp. (946499746)