Hydroxypropyl betadex has been widely investigated in pharmaceutics and has principally been used as a solubilizer for hydrophobic molecules in oral liquids, oral solids, parenterals, pressurized metered dose inhalers, dry powder inhalers, and topical formulations. It has also been shown to act as a stabilizer during processing and storage of formulations. It is a Release Modifying Agent, Squestering Agent, Tonicity Agent, Complexing Agent.