Alexion Pharmaceuticals, Inc.
The primary objective of this study is to evaluate the efficacy of 15-week treatment with ALXN2420 versus placebo for decreasing insulin-like growth factor IGF-1 levels, when administered in combination with somatostatin analog (SSA) therapy to adult participants with acromegaly.
Inclusion Criteria: * Documented diagnosis of acromegaly, that is, historically documented evidence of a GH-secreting pituitary adenoma based on MRI or pathology report * Must be receiving maximum, or maximally tolerated dose per treating physician judgment, of long-acting SSAs (octreotide or lanreotide LAR) and meet both of the following: 1. Received for ≥ 6 months prior to screening 2. Receiving a once-monthly regimen (approximately every 4 weeks). Note: participants on stable regimens of other durations (for example, every 3 or 6 weeks) are not eligible * Must be a partial responder t…
ALXN2420 will be administered via subcutaneous (SC) injection
Placebo will be administered via SC injection.