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Acthar Gel

Brand and Other Names: Acthar Gel
Mechanism of Action:

Stimulates adrenal cortex to release cortisol, aldosterone, and weak androgens

Binds to melanocortin receptors

May suppress endogenous ACTH release via feedback

Indications:
  • Infantile Spasms (monotherapy for children <2 years)

    • IM only, not via prefilled SelfJect.

  • Multiple Sclerosis (MS) (acute exacerbations in adults)

    • IM or SC; 80–120 units daily for 2–3 weeks.

  • Other approved uses (as adjunct or short-term therapy):

    • Rheumatic disorders (RA, psoriatic arthritis)

    • Collagen diseases (lupus, dermatomyositis)

    • Dermatologic (erythema multiforme, Stevens-Johnson)

    • Allergic states (serum sickness)

    • Ophthalmic diseases (uveitis, optic neuritis)

    • Respiratory (sarcoidosis)

    • Edematous states (nephrotic syndrome without uremia)

Route: subcutaneous or intramuscular
Dose:
  • Infantile Spasms: 150 U/m²/day IM (75 U/m² BID) for 2 weeks, then taper over 2 weeks.
  • MS exacerbations: 80–120 units daily (IM or SC) for 2–3 weeks, taper if needed.
  • Other indications: 40–80 units IM/SC every 24–72 hours, individualized.

SelfJect Injectors:

  • 40 Units (Green): for 40-unit SC doses only.
  • 80 Units (Purple): for 80-unit SC doses only.
  • Not suitable for infantile spasms.
Adverse Reactions:

In Infants (<2 years with infantile spasms):

  • Infection (20–46%)
  • Convulsions, irritability, hypertension, pyrexia
  • GI issues (vomiting, diarrhea)
  • Cushingoid symptoms, weight gain
Contraindication:

IV use

Infants <2 years with suspected congenital infections

Patients with: scleroderma, systemic fungal infections, CHF, uncontrolled hypertension, porcine protein allergy

Warnings and Precautions:

Infection risk: Immunosuppressive; may worsen or reactivate latent infections.

Adrenal suppression and Cushing's syndrome

Hypertension, fluid retention, hypokalemia

GI perforation/ulcers, especially with underlying GI disorders

Behavioral/mood changes, including euphoria, depression, psychosis

Eye effects: Cataracts, glaucoma, secondary infections

Growth suppression in children

Bone density loss and osteoporosis risk

 

 

See package insert for full prescribing information.