Optically active isomers of ketotifen and therapeutically...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C546S202000

Reexamination Certificate

active

10069663

ABSTRACT:
Racemic norketotifen, racemic 10-hydroxy-ketotifen, racemic 10-hydroxy-nor-ketotifen and optically active isomers of ketotifen, norketotifen, 10-hydroxy-ketotifen and 10-hydroxy-norketotifen were found to have antiallergic and anti-inflammatory effects while being devoid of the severe dose-limiting sedative side effects of ketotifen.

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