Brandon I know the emotional & mental strain of your situation. My BD male hunger striked for 6 weeks. As each day passes it is a day you cannot get back but I wanna encourage you to continue to be patient w clean water and a stress free environment.
I am not against medicating, but I am if it’s random and not specific in what you’re treating.
This type of toxic/organ/neurological damage is not really something traditional meds you mentioned will treat, and they would likely cause further organ damage d/t the way they’re metabolized.
Can you make a small batch of gel food with some dew worms, a little shrimp, maybe some ground up massivore pellets? Something that will smell great to him and not need much work to chew? There may be some commercially available as well