Relative Bioavailability Study of Four Experimental Formulations for Alzheimer's Disease

Oral, 25 mg Hard Gelatin Capsule, Size #2, 150 mg, Once per period of 3, 7 days between dosings. Will be compared with any 2 comparators.

Oral, 75 mg Tablet Formulation 1, 150 mg, Once per period of 3, 7 days between dosings

Oral, 50 mg Hard Gelatin Capsule, Size #0, 150 mg, Once per period of 3, 7 days between dosings

Oral, 75 mg Soft Gelatin Capsule, 150 mg, Once per period of 3, 7 days between dosings

Oral, 75 mg Tablet Formulation 2, 150 mg, Once per period of 3, 7 days between dosings