Idebenone (pronounced eye-deb-eh-known) is an organic compound of the quinone family and promoted commercially as a synthetic analog of coenzyme Q₁₀ (CoQ₁₀).

Idebenone is claimed to have properties similar to CoQ₁₀ in its antioxidant properties.^[specify] Idebenone is a synthetic analogue of coenzyme Q10 used in Europe in the treatment of vascular and degenerative diseases of the central nervous system.

Research on idebenone as a potential therapy of Alzheimer’s disease have been inconsistent, but there may be a trend for a slight benefit. Idebenone may benefit those with Friedreich’s ataxia.

It inhibits lipoperoxide.