@gphetteplace and @rosemarya, thank you for your replies. After I wrote the introductory message, my brother was re-admitted to the hospital (2nd time not including transplant operation). It is somewhat a relief since he is under the care of professionals (and scary at the same time). Several things in this episode concerned us and, maybe, these signs will help others. His teeth were chattering even though he was not cold and his tremors (which he developed prior to the transplant due to the ammonia accumulation) had returned and were worse. He was more than usually fatigued and so pale and was having trouble urinating. He said the "normal" urges for urination and BM were "not right." We also were having trouble getting him to eat. Ultimately, he let us call the post-transplant coordinator. Now, the MDs are running many tests and, hopefully, we will have a clearer picture soon. I am so grateful to know others have successfully managed this road and I wish you all the best health.