Source: Sienna Biopharmaceuticals Sienna Biopharmaceuticals, Inc. (NASDAQ:SNNA), a clinical-stage medical dermatology and aesthetics company, today announced results from a Phase 1b maximal use (MUse) pharmacokinetic (PK) and safety study of SNA-120 (pegcantratinib), a Phase 2b drug candidate being evaluated as a topical, nonsteroidal therapy to treat itch (pruritus) associated with psoriasis.…...