303-53-7 Categories: , ,
  • #LGM Pharma is a Cyclobenzaprine CAS# 303-53-7 API supplier distributor based in the USA. Inquire about DMF, cGMP, price, availability, delivery, purity, and more.
  • #Questions? Call our customer API support number 1-(800)-881-8210.
  • #LGM Pharma offers this active ingredient but not the finished dosage forms.

Product Details:

  • CAS No: 303-53-7
  • AHFC code: 12:20.0
  • Synonyms: 10,11-Dehydroamitriptyline, 5-(3-Dimetilaminopropiliden)-5H-dibenzo-(a,d)-ciclopentene, 5-(3-Dimetilaminopropiliden)-5H-dibenzo-(a,d)-ciclopentene [Italian], 9715 R.P., Ciclobenzaprina, Ciclobenzaprina [INN-Spanish], Cyclobenzaprine, Cyclobenzaprinum, Cyclobenzaprinum [INN-Latin], EINECS 206-145-8, Fexmid, Lisseril, MK 130, N,N-Dimethyl-5H-dibenzo(a,d)cycloheptene-delta(sup 5),gamma-propylamine, Proeptatriene, Proeptatriene [Italian], Proheptatrien, Proheptatriene, Ro 4-1577, UNII-69O5WQQ5TI
  • ATC Code: M03BX08
  • Chemical Formula: C20-H21-N
  • Molecular Weight: 275.3929
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB00924 (APRD00213)
  • SMILES: CN(C)CCC=C1c2ccccc2C=Cc3c1cccc3
  • InChl: 1S/C20H21N/c1-21(2)15-7-12-20-18-10-5-3-8-16(18)13-14-17-9-4-6-11-19(17)20/h3-6,8-14H,7,15H2,1-2H3
  • PubChem: 2895
  • IUPAC: dimethyl(3-{tricyclo[³,⁸]pentadeca-1(15),3,5,7,9,11,13-heptaen-2-ylidene}propyl)amine

Additional Details

For use as an adjunct to rest and physical therapy for relief of muscle spasm associated with acute, painful musculoskeletal conditions.
Cyclobenzaprine, closely related to the antidepressant amitriptyline, is used as a skeletal muscle relaxant to reduce pain and tenderness and improve mobility. Unlike dantrolene, cyclobenzaprine cannot be used to treat muscle spasm secondary to cerebral or spinal cord disease.
Mode of Action:
Like other tricyclic antidepressants, cyclobenzaprine exhibits anticholinergic activity, potentiation of norepinephrine, and antagonism of reserpine. Cyclobenzaprine does not directly act on the neuromuscular junction or the muscle but relieves muscle spasms through a central action, possibly at the brain stem level. Cyclobenzaprine binds to the serotonin receptor and is considered a 5-HT2 receptor antagonist that reduces muscle tone by decreasing the activity of descending serotonergic neurons.
Extensively metabolized (gastrointestinal and hepatic).
Oral mouse and rat LD50 are 338 mg/kg and 425 mg/kg respectively. Signs of overdose include agitation, coma, confusion, congestive heart failure, convulsions, dilated pupils, disturbed concentration, drowsiness, hallucinations, high or low temperature, increased heartbeats, irregular heart rhythms, muscle stiffness, overactive reflexes, severe low blood pressure, stupor, and vomiting.
General Reference:
Products currently covered by valid US Patents are offered for R&D use in accordance with 35 USC 271(e)+A13(1). Any patent infringement and resulting liability is solely at buyer risk.

API’s From Quality Manufacturers:

  • Cost effective materials based on specific requirements
  • Small quantities for initial research and larger development quantities towards product commercialization


  • Technical packages, letters of access to filed DMFs
  • Complete assistance in any regulatory filings
  • Top quality GMP certified manufacturers
  • Have necessary regulatory credentials


Related YouTube Videos