Metaxalone

Metaxalone Brand Names- Metaxall | Skelaxin

What is Metaxalone

Metaxalone is an oral CNS depressant used as adjunct therapy for acute, painful musculoskeletal conditions.

Although the drug is classified as a skeletal muscle relaxant, it does not directly relax skeletal muscle.

Most of the beneficial effects of metaxalone are thought to be due to its sedative properties.

Metaxalone does not effectively treat skeletal muscle hyperactivity secondary to chronic neurologic disorders (e.g., cerebral palsy).

Metaxalone was FDA-approved in 1962.

Indications

  • musculoskeletal pain

For the treatment of musculoskeletal pain associated with acute, painful musculoskeletal conditions, as an adjunct to rest, physical therapy, and other measures

Side Effects

  1. anaphylactoid reactions
  2. anxiety
  3. dizziness
  4. drowsiness
  5. dyspepsia
  6. headache
  7. hemolytic anemia
  8. irritability
  9. jaundice
  10. leukopenia
  11. nausea
  12. pruritus
  13. rash
  14. serotonin syndrome
  15. vomiting

Monitoring Parameters

  • LFTs
  • serum creatinine/BUN

Contraindications

  • anemia
  • breast-feeding
  • coadministration with other CNS depressants
  • driving or operating machinery
  • ethanol ingestion
  • geriatric
  • hemolytic anemia
  • hepatic disease
  • hyperglycemia
  • laboratory test interference
  • pregnancy
  • renal disease
  • renal failure
  • renal impairment

Interactions

  • Acetaminophen; Butalbital
  • Acetaminophen; Butalbital; Caffeine
  • Acetaminophen; Butalbital; Caffeine; Codeine
  • Acetaminophen; Caffeine; Dihydrocodeine
  • Acetaminophen; Caffeine; Magnesium Salicylate; Phenyltoloxamine
  • Acetaminophen; Caffeine; Phenyltoloxamine; Salicylamide
  • Acetaminophen; Chlorpheniramine; Dextromethorphan; Phenylephrine
  • Acetaminophen; Chlorpheniramine; Dextromethorphan; Pseudoephedrine
  • Acetaminophen; Chlorpheniramine; Phenylephrine; Phenyltoloxamine
  • Acetaminophen; Codeine
  • Acetaminophen; Dextromethorphan; Doxylamine
  • Acetaminophen; Dichloralphenazone; Isometheptene
  • Acetaminophen; Diphenhydramine
  • Acetaminophen; Hydrocodone
  • Acetaminophen; Oxycodone
  • Acetaminophen; Pentazocine
  • Acetaminophen; Tramadol
  • Acrivastine; Pseudoephedrine
  • Alfentanil
  • Alprazolam
  • Amitriptyline
  • Amitriptyline; Chlordiazepoxide
  • Amobarbital
  • Amoxapine
  • Anxiolytics; Sedatives; and Hypnotics
  • Apomorphine
  • Aspirin, ASA; Butalbital; Caffeine
  • Aspirin, ASA; Butalbital; Caffeine; Codeine
  • Aspirin, ASA; Caffeine; Dihydrocodeine
  • Aspirin, ASA; Carisoprodol; Codeine
  • Aspirin, ASA; Oxycodone
  • Atropine; Difenoxin
  • Atropine; Diphenoxylate
  • Atropine; Hyoscyamine; Phenobarbital; Scopolamine
  • Azelastine
  • Azelastine; Fluticasone
  • Bacitracin
  • Barbiturates
  • Belladonna Alkaloids; Ergotamine; Phenobarbital
  • Belladonna; Opium
  • Benzhydrocodone; Acetaminophen
  • Benzodiazepines
  • Botulinum Toxins
  • Brompheniramine
  • Brompheniramine; Carbetapentane; Phenylephrine
  • Brompheniramine; Dextromethorphan; Guaifenesin
  • Brompheniramine; Dextromethorphan; Phenylephrine
  • Brompheniramine; Guaifenesin; Hydrocodone
  • Brompheniramine; Hydrocodone; Pseudoephedrine
  • Brompheniramine; Pseudoephedrine
  • Buprenorphine
  • Buprenorphine; Naloxone
  • Buspirone
  • Butabarbital
  • Butorphanol
  • Cannabidiol
  • Carbetapentane; Chlorpheniramine
  • Carbetapentane; Chlorpheniramine; Phenylephrine
  • Carbetapentane; Diphenhydramine; Phenylephrine
  • Carbetapentane; Guaifenesin
  • Carbetapentane; Guaifenesin; Phenylephrine
  • Carbetapentane; Phenylephrine
  • Carbetapentane; Phenylephrine; Pyrilamine
  • Carbetapentane; Pseudoephedrine
  • Carbetapentane; Pyrilamine
  • Carbidopa; Levodopa; Entacapone
  • Carbinoxamine
  • Carbinoxamine; Dextromethorphan; Pseudoephedrine
  • Carbinoxamine; Hydrocodone; Phenylephrine
  • Carbinoxamine; Hydrocodone; Pseudoephedrine
  • Carbinoxamine; Phenylephrine
  • Carbinoxamine; Pseudoephedrine
  • Cenobamate
  • Cetirizine
  • Cetirizine; Pseudoephedrine
  • Chlophedianol; Dexbrompheniramine
  • Chlophedianol; Dexchlorpheniramine; Pseudoephedrine
  • Chloral Hydrate
  • Chlorcyclizine
  • Chlordiazepoxide
  • Chlordiazepoxide; Clidinium
  • Chlorpheniramine
  • Chlorpheniramine; Codeine
  • Chlorpheniramine; Dextromethorphan
  • Chlorpheniramine; Dextromethorphan; Phenylephrine
  • Chlorpheniramine; Dihydrocodeine; Phenylephrine
  • Chlorpheniramine; Dihydrocodeine; Pseudoephedrine
  • Chlorpheniramine; Guaifenesin; Hydrocodone; Pseudoephedrine
  • Chlorpheniramine; Hydrocodone
  • Chlorpheniramine; Hydrocodone; Phenylephrine
  • Chlorpheniramine; Hydrocodone; Pseudoephedrine
  • Chlorpheniramine; Phenylephrine
  • Chlorpheniramine; Pseudoephedrine
  • Clemastine
  • Clomipramine
  • Clonazepam
  • Clorazepate
  • Clozapine
  • Codeine
  • Codeine; Guaifenesin
  • Codeine; Phenylephrine; Promethazine
  • Codeine; Promethazine
  • COMT inhibitors
  • Cyclizine
  • Cyproheptadine
  • Desipramine
  • Deutetrabenazine
  • Dexchlorpheniramine
  • Dexchlorpheniramine; Dextromethorphan; Pseudoephedrine
  • Dexmedetomidine
  • Dextromethorphan; Diphenhydramine; Phenylephrine
  • Diazepam
  • Dihydrocodeine; Guaifenesin; Pseudoephedrine
  • Dimenhydrinate
  • Diphenhydramine
  • Diphenhydramine; Hydrocodone; Phenylephrine
  • Diphenhydramine; Ibuprofen
  • Diphenhydramine; Naproxen
  • Diphenhydramine; Phenylephrine
  • Doxepin
  • Doxylamine
  • Doxylamine; Pyridoxine
  • Dronabinol
  • Droperidol
  • Entacapone
  • Esketamine
  • Estazolam
  • Eszopiclone
  • Ethanol
  • Fenfluramine
  • Fentanyl
  • Flurazepam
  • food
  • Gabapentin
  • General anesthetics
  • Guaifenesin; Hydrocodone
  • Guaifenesin; Hydrocodone; Pseudoephedrine
  • Homatropine; Hydrocodone
  • Hydrocodone
  • Hydrocodone; Ibuprofen
  • Hydrocodone; Phenylephrine
  • Hydrocodone; Potassium Guaiacolsulfonate
  • Hydrocodone; Potassium Guaiacolsulfonate; Pseudoephedrine
  • Hydrocodone; Pseudoephedrine
  • Hydromorphone
  • Hydroxyzine
  • Ibuprofen; Oxycodone
  • Imipramine
  • Lasmiditan
  • Lemborexant
  • Levocetirizine
  • Levorphanol
  • Lofexidine
  • Lorazepam
  • Loxapine
  • Lumateperone
  • Maprotiline
  • Meclizine
  • Mepenzolate
  • Meperidine
  • Meperidine; Promethazine
  • Mephobarbital
  • Meprobamate
  • Methadone
  • Methohexital
  • Methscopolamine
  • Midazolam
  • Mirtazapine
  • Molindone
  • Morphine
  • Morphine; Naltrexone
  • Nabilone
  • Nalbuphine
  • Nortriptyline
  • Oxazepam
  • Oxycodone
  • Oxymorphone
  • Ozanimod
  • Pentazocine
  • Pentazocine; Naloxone
  • Pentobarbital
  • Perphenazine; Amitriptyline
  • Phenobarbital
  • Phenothiazines
  • Pregabalin
  • Primidone
  • Protriptyline
  • Quazepam
  • Remifentanil
  • Secobarbital
  • Sedating H1-blockers
  • Sodium Oxybate
  • Sufentanil
  • Tapentadol
  • Temazepam
  • Thalidomide
  • Thiopental
  • Thiothixene
  • Tolcapone
  • Tramadol
  • Trazodone
  • Triazolam
  • Tricyclic antidepressants
  • Trimipramine
  • Triprolidine
  • Zaleplon
  • Ziprasidone
  • Zolpidem
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