You could save the samples. Just try the increased Lithium for awhile and if that cuts the mustard then there is no need for the Latuda and being over medicated.

If the Lithium isn't enough then that is a valuable piece of information that you won't have if you're taking the Latuda as well.

Just a thought. I obviously do not know what is happening in you and your life and only you can make this decisions. I'm just throwing stuff out there. I tend to be an over thinker.

I know it isn't as easy as all that when you're suffering and want to to stop.

I don't know exactly what the main issue is for you right now. Would you be open to a benzo short term just to give you some immediate relief while you wait for the Lithium to kick in? I know benzos can be tricky things. For me they saved me when I needed them and I was okay going off slowly. Somehow agitated depression was more bearable without the agitation. I know it doesn't work like that for everybody.