TFF Pharmaceuticals, a clinical-stage biopharmaceutical company focused on developing and commercializing innovative drug products based on its patented Thin Film Freezing (TFF) technology platform, and Felix Biotechnology, a clinical stage, biotherapeutic-based antibiotic development company, today jointly announce that both companies have entered into a letter of intent (LOI) which reflects the parties’ non-binding agreement in principle to negotiate and enter into a collaboration, development and licence agreement (CDLA).