Is the person having memory problems? If not, why are they taking it? There are lots of drugs that have "off label" uses for lots of drugs so perhaps it was prescribed for something else. The doctor can probably let you know what that is and why it's being used. I don't think it will hurt, but there are side effects in every med and it would be a good idea to check drug interactions, etc. Try Drugs.com. If you cannot speak to the patient's doc, can you call your own?
Cat
I cannot answer this question for you , perhaps put it into the Family Medicine Forum or one of the expert Doctor Forums, Good luck