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