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Oleic Acid

Excipient (pharmacologically inactive substance)

Medically reviewed by Last updated on Sep 1, 2020.

What is it?

Oleic acid, C18H34O2, is a fatty acid. It is used commercially in the preparation of oleates and lotions, and as a pharmaceutical solvent. It can be found in many animal and vegetable fats; it is primarily a monounsaturated fat. Olive oil is composed of primarily of oleic acid. Oleic acid use in asthma inhalers has been implicated in causing secondary bronchospasms in children.[1] [2]

Top Medications with this excipient


[1] Olive Oil. Accessed February 26, 2015 at

[2] Inactive Ingredients in Pharmaceutical Products: Update. Committee on Drugs Pediatrics 1997;99;268

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.