This is a multicenter, multiple dose study to examine the effect of Acthar on functional decline in adult participants with ALS. Approximately 213 participants will be enrolled.
Following a screening period of up to 28 days, participants with ALS and symptom onset (defined as first muscle weakness or dysarthria) ≤ 2 years prior to the Screening Visit will be randomized on a 2:1 basis to receive subcutaneous (SC) Acthar 0.2 mL (16 Units \[U\]) daily (QD) or SC matching placebo 0.2 mL QD for 36 weeks, followed by a 3-week taper.
Participants who complete the 36 week double-blind treatment period are eligible to enter an Open Label Extension phase in which all participants will receive Acthar 0.2 mL (16 U) daily.
