The United States of America As Represented by the Department of Health

William DeGraff

James B Mitchell

Stephen Hahn

Amram Samuni

The instant invention is directed to the use of a biologically compatible composition, containing an effective amount of a metal independent nitroxide compound which is preferably represented by the formula ##STR1## wherein R.sub.1 is --CH.sub.3 ; R.sub.2 is --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, --C.sub.4 H.sub.9, --C.sub.5 H.sub.11, --C.sub.6 H.sub.13, --CH.sub.2 --CH(CH.sub.3).sub.2, --CHCH.sub.3 C.sub.2 H.sub.5, or --(CH.sub.2).sub.7 --CH.sub.3, or wherein R.sub.1 and R.sub.2 together form spirocyclopentane, spirocyclohexane, spirocycloheptane, spirocyclooctane, 5-cholestane, or norbornane, R.sub.3 is --O. or --OH, or a physiologically acceptable salt thereof, and a pharmaceutically acceptable carrier, as antioxidants capable of protecting cells, tissues, organs, and whole organisms against the deleterious effects of harmful oxygen-derived species generated during oxidative stress.

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Wheaton, MD, United States of America

William DeGraff