I am sorry to hear of your husband's poor health. I had a liver transplant in August 2020. I had no known allergies, but two medications gave me a lot of trouble: TACROLIMUS made it hard for me to talk and think straight, I had a seizure and hallucinations. This happened after being out of the hospital only a couple of days. I now take CYCLOSPORINE (since mid-August 2020) with no bad effects so far. The other medication is BACTRIM. It apparently caused acute kidney failure and I ended up in the hospital for another 5 days. That was about 3 months post transplant surgery. BACTRIM was replaced with three PANTAMADINE respiratory treatments 30 days apart - last one was a few weeks ago.
Have you suggested to his docs a replacement medication(s)?
I will keep your family in my prayers.
Pinky Johnson