This study is being performed in order to learn more about a new drug (possible as treatment for people with Alzheimer's Disease and other conditions with cognitive dysfunction (memory and attention problems)) and how it is handled by the body by giving the drug to healthy volunteers with different genotypes.

Inclusion Criteria:

• Physically healthy volunteers
• Participation in a previous study for genotyping for identification to be extensive, intermediate or poor metaboliser (CYP2D6 enzyme)

Exclusion Criteria:

• History of clinically significant diseases or illness.
• Ues of any prescribed or non-prescribed medications from 2 weeks prior to first treatment day except for paracetamol and OTC adrenergic nasal spray.