The present disclosure refers to heptyl glucoside included, as a natural solubilizer and as a skin penetration enhancer, in transdermal pharmaceutical compositions. Heptyl glucoside is a natural alkyl glycoside and a hydrotrope that improves solubility of active pharmaceutical ingredients (APIs), thereby enhancing skin permeability to APIs. Transdermal pharmaceutical compositions including heptyl glucoside allow lower APIs dosage requirements. Heptyl glucoside can be combined with at least one API and suitable ingredients to formulate transdermal pharmaceutical compositions with improved skin permeability, thereby promoting percutaneous absorption of APIs. Transdermal pharmaceutical compositions including heptyl glucoside can be formulated in a plurality of dosage forms, such as, a liquid, cream, paste, gel, lotion, patch (e.g., matrix and reservoir), tape, film former (e.g., plaster), and the like.
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