Sounds like it’s not related but getting decent sleep is what helped me. My pdoc concentrated on getting me to have good sleep hygiene. I take, 15 mg of ambien ( that a high doses ) I too had anxiety with my mania and lost weight. The first time that happened they wanted to put down anorexia too. But it was just the anxiety. In addition to the high dose of ambien I take Latuda, Benadryl, melatonin and Tylenol. I refuse to take benzos as they end up causing anxiety.

Oh I forgot. We added 25 mg of seroquel to my regimen.

Best of luck. May you find the combo that helps you.