Should I tell my friend when she repeats info/stories 3, 4 or more times?

Background: My friend is in her mid-50’s & takes meds for bipolar disorder. She has begun telling me stories multiple times, having forgotten she’s already told me. I’ve been listening patiently but I’m wondering if I should politely tell her she’s repeating in case her forgetfulness is related to her meds? Also, she adopted a rescue dog recently and seems to be insinuating herself into the life of the family that gave it up. When I said her contact might be making them sad she told me to f**k off. This isn’t like her… I’m worried about her.