Current topical formulations for cough suppressants and analgesics typically rely on hydrophobic- or aqueous-based vehicles that provide limited scent intensity and short-duration aroma profiles. This is primarily due to rapid volatilization and instability of active scent compounds, which compromise therapeutic efficacy and user experience. There is a need for novel formulation chassis and advanced scent delivery technologies that enable enhanced scent intensity, prolonged duration, and uniform, stable release of volatile actives across various delivery systems for topical forms (ointment, stick, roll-on, cream, spray).  

Scent release is strongly influenced by formulation, as certain rheology modifiers can entrap aroma and fragrance oils, resulting in diminished scent intensity. High fragrance oil loading (>10%) poses additional challenges in water-based systems, often causing phase separation and compromising product stability, and may deliver initial strength without prolonged scent intensity. 

Successfully addressing fragrance entrapment and phase stability limitations will require integrated approaches that manage the inherent volatility and stability challenges of fragrance systems through controlled release, fixatives, and optimized carrier systems to achieve consistent, prolonged scent performance.