glatiramer acetate

Class




  • Immunosuppressive agent, immunomodulator




Glatiramer Acetate


Commonly Prescribed for


(FDA approved in bold)



  • For reduction of relapses in patients with relapsing-remitting multiple sclerosis. (RRMS)
  • Clinically isolated syndromes (CIS)



Glatiramer Acetate


How the Drug Works



  • By modifying the immune processes responsible in part for the development of MS. Glatiramer is a mixture of 4 amino acids thought to approximate the antigenic structure of myelin basic protein (MBP). Experimentally competes with CNS MBP for presentation to T cells
  • Inducer of specific T 2 helper-type cells that express anti-inflammatory cytokines



Glatiramer Acetate


How Long Until It Works



  • At least 6 months



Glatiramer Acetate


If It Works



  • Continue to use until RRMS becomes progressive



Glatiramer Acetate


If It Doesn’t Work



  • Change to an interferon, reconsider the diagnosis of RRMS, and consider using natalizumab or mitoxantrone, especially for secondary progressive MS



Glatiramer Acetate


Best Augmenting Combos for Partial Response or Treatment-Resistance



  • Acute attacks are often treated with glucocorticoids, especially if there is functional impairment due to vision loss, weakness, or cerebellar symptoms
  • Treat common clinical symptoms with appropriate medication for spasticity (baclofen, tizanidine), neuropathic pain, and fatigue (modafinil)
  • For patients with RRMS refractory to glatiramer, (measured by clinical relapses and MRI accumulation of lesions) consider changing to interferon-beta, natalizumab, or mitoxantrone. Other options, which are experimental, include monthly methylprednisolone, pulse cyclophosphamide, and other immunosuppressants
  • Combination therapy may have a role, but has not been proven more effective than monotherapy. There is an ongoing clinical trial looking at combination treatment with avonex and copaxone



Glatiramer Acetate


Tests



  • None required



Adverse Effects (AEs)




Glatiramer Acetate


How Drug Causes AEs



  • Except for injection site reactions, the cause of AEs (i.e., chest pain) seen with glatiramer use are unclear



Glatiramer Acetate


Notable AEs



  • Chest pain, usually immediately post-injection, is common and typically lasts less than a minute, with no associated ECG changes or adverse consequences. This usually starts about 1 month after initiation of treatment
  • About 10% of patients experience immediate post-injection reactions, including anxiety, flushing, dyspnea, throat constriction, and urticaria
  • Injection site reactions including erythema, induration, pain, pruritus, welts, inflammation, or hemorrhage
  • Fever, neck pain, migraine, agitation, anxiety, sweating, and weight gain are slightly more common in treated patients



Glatiramer Acetate


Life-Threatening or Dangerous AEs



  • None



Glatiramer Acetate


Weight Gain



  • Not unusual



Glatiramer Acetate


Sedation



  • Unusual

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Feb 16, 2017 | Posted by in PHARMACY | Comments Off on glatiramer acetate

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