| CPC A61K 31/455 (2013.01) [A61K 31/192 (2013.01)] | 10 Claims | 
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               1. A method of treating Alzheimer's disease in a human in need thereof, comprising administering a therapeutically effective dosage regimen of a co-crystal comprising itanapraced and nicotinamide to the human, 
            wherein the co-crystal has an X-ray Powder Diffraction Pattern (XRPD) with specific peaks, expressed in 2θ produced from a Cu radiation source (λ=1.54 Å after Ni filtering), at about 14.63°; 14.90°; 15.56°; 16.71°; 18.24°; 18.46°, 20.03°; 20.27°; 22.01°, 22.27°; 24.17°; 24.47°; 26.14°; 26.47°; 27.83°; 28.85°; 29.97°; 30.64°; 32.42°; 34.07°; and 39.14°, all +/−0.2 degrees 2θ. 
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