Phase I

Phase II

Phase III

Prader-Willi Syndrome
Phase II ready – FDA Orphan Drug and Rare Pediatric Disease Designation


TNX-2900 (intranasal potentiated oxytocin), Tonix’s proprietary intranasal oxytocin formulation, is in development for the treatment of Prader-Willi syndrome (PWS). TNX-2900 has received Orphan Drug and Rare Pediatric Disease designations from the U.S. Food and Drug Administration (FDA) and its IND has been cleared.

Prader-Willi syndrome is the most common genetic cause of life-threatening childhood obesity1 and results in lack of suckling in infants and, in children and adolescents, severe hyperphagia, an overriding physiological drive to eat, leading to severe obesity and other complications associated with significant mortality. There is no approved treatment for either the suckling deficit in babies or the obesity and hyperphagia in older children associated with Prader-Willi syndrome. PWS is a rare disease occurring in approximately one in 15,000 births. Intranasal oxytocin has been shown to improve suckling in newborn animals but also suppresses feeding behaviors in adult animal models.

Tonix’s patented potentiated oxytocin formulation is believed to increase specificity for oxytocin receptors relative to vasopressin receptors as well as to enhance the potency of oxytocin.

1Foundation for Prader-Willi Research (
TNX-2900 is an investigational new drug and has not been approved for any indication.