BL-1020 (perphenazine 4-aminobutanoate) is an investigational orally-active antipsychotic for the possible treatment of schizophrenia. The chemical is an ester of GABA and perphenazine; pharmacologically it acts as a D₂ antagonist and GABA agonist. It has shown pro-cognitive effects in the trials. In March 2013, it went into the II/III trial phase. It has been introduced by BioLineRx, a biopharmaceutical development company.