Greetings! Thank you for your question. This is a challenging one - you have been well for years on 60 mg, but now because of a new drug warning, your doc feels compelled to change the dose (I'd personally just get an EKG to make sure you are ok, and at 28 would presume you generally are, and monitor you rather than just reduce the dose, but that is just me). Typically, people become more manic if they increase rather than decrease the dose.
However, there are several possible explanations:
(1) The lower dose has uncovered anxiety, which looks like mania. Unfocused energy, constant frenetic activity, these can all look like mania, but they can also be signs of anxiety. For it to be mania, we'd need to also see a euphoric or extremely irritable mood, abnormally-elevated energy, and a decreased need or desire for sleep, to name a few.
With me so far?
I see you are offline right now, so please let me know when you are online so we can continue! Regards, Dr. Anderson