December 1, 2015


(testosterone) Nasal Gel


Natesto (testosterone) nasal gel is a slightly yellow gel containing 5.5 mg of testosterone in 122.5 mg of Natesto gel for nasal administration. The active pharmacologic ingredient in Natesto is testosterone, an androgen. Testosterone is a white to practically white crystalline powder chemically described as 17β-Hydroxyandrost-4-en-3-one. The structural formula is:

Natesto (testosterone) Structural Formula Illustration

MW: 288.4      MF: C19H28O2

Last reviewed on RxList: 9/8/2015
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Women's Health

Find out what women really need.