PaxMedica, Inc., a clinical stage biopharmaceutical company, focuses on the development of anti-purinergic drug therapies (APT) for the treatment of disorders with intractable neurologic symptoms. The company's lead product candidate is PAX-101, an intravenous formulation of suramin for various indications, including autism spectrum disorder, myalgic encephalomyelitis/chronic fatigue syndrome, long COVID-19 syndrome, and human African trypanosomiasis (HAT). It also develops PAX-102, an intranasal formulation of suramin for neurologic indications; and HAT-301 for the treatment of stage 1 East African HAT. The company was formerly known as Purinix Pharmaceuticals LLC and changed its name to PaxMedica, Inc. in April 2020. PaxMedica, Inc. was founded in 2018 and is based in Tarrytown, New York.