Hi My Nameis Is Lynette. My Father, Who Is 65,

Hi my nameis is Lynette. My father, who is 65, has dementia. He served in the Marine Corp in Vietnam. He came home and got a job in Detroit,MI as a metal machinist. He was diagnosed with bi-polar disorder 20 years ago as well. He and my step mother recently moved in with me and my husband who live in California. I am needing to know what are some of the typical medications that he should be trying to help with his mood and his cognitive skills? Please let me know if you need more info to assist. Thank you