Patent ID: 7893054

Claim:
A method for the treatment of Alzheimer's Disease, which method comprises administering to a subject in need thereof a medicament composition comprising a diaminophenothiazine, wherein the diaminophenothiazine has been pre-reduced such that it is present in at least 80, 90, 95 or 99% reduced (leuco-) form, wherein the diaminophenothiazine is pre-reduced by addition of an exogenous reducing agent, and wherein the reduced form is lyophilised, wherein the pre-reduced diaminophenothiazine has the formula: wherein R 1 , R 3 , R 4 , R 6 , R 7 and R 9 are independently selected from hydrogen, halogen, hydroxy, carboxy, substituted or unsubstituted alkyl, haloalkyl or alkoxy; R 5 is hydrogen; and each R 10 and R 11 is independently selected from hydrogen, hydroxy, carboxy, substituted or unsubstituted alkyl, haloalkyl or alkoxy; or is a pharmaceutically acceptable salt thereof.