Patent ID: 8455502

Claim:
A method for treating an impairment of perception, concentration, cognitive processes, learning and/or memory, which impairment is a consequence of dementia, stroke, craniocerebral trauma, dementia with degeneration of the frontal lobes, Lewy body dementia, vascular dementia, attention deficit syndrome, Parkinson's disease, schizophrenia, depression, affective disorders, psychoses, neuroses, anxiety, mania, a manic depressive disorder, Pick's disease, pain or epilepsy which comprises administering to a patient an effective amount of a selective PDE9A inhibitor compound, wherein the selective PDE9A inhibitor inhibits human PDE9A with an IC 50 of less than 10 μM, and wherein the selective PDE9A inhibitor inhibits human PDE9A more strongly than it inhibits human PDE1C, PDE2A, PDE3B, PDE4B, PDE5A, PDE7B, PDE8A, PDE10A and PDE11.