Formulations and methods for transdermal drug delivery compositions that include anastrozole are disclosed. Transdermal anastrozole compositions of the present disclosure may be indicated for treating testosterone deficiency. Disclosed transdermal anastrozole compositions may include permeation enhancers that may improve penetration of anastrozole in human skin. Permeation enhancers within transdermal anastrozole compositions may include oils from Amazon rainforest such as Pracaxi oil, Plukenetia volubilis seed oil, Inaja oil, and Patauá oil, which includes behenic and oleic fatty acids that may provide penetration power. Transdermal anastrozole may include organic solvents as transdermal penetration enhancers. Additionally, transdermal anastrozole compositions may include physiological lipids, phospholipids, and one or more butters rich in linoleic acid and linolenic acid that may also provide penetration power with restorative benefits to the skin.
