Matthew,
You asked about other treatments for aplastic anemia.
There are drugs that can boost blood counts. They can reduce the need for transfusions and reduce the effects of low blood counts, e.g., fatigue, headaches, bleeding, bruising. But they don't treat the disease, which is the underlying cause of low blood counts.
In contrast, the goal of primary treatments with ATG, cyclosporine, and eltrombopag (brand name Promacta) is to control the disease (aplastic anemia). If the disease can be controlled, blood cell production can return to normal, or at least get blood counts up out of the danger zone.
ATG can be given any number of times. Our friend
Andrea had ATG treatment five times and is now doing fine.