Are there any treatment options for colitis other than aminosalicylates and steroids?

I was diagnosed with UC at the beginning of the year by this terrible doctor who put me on Asacol (without reading my chart and seeing that I have a solitary kidney and renal disease). My nephrologist was shocked and I’m no longer taking it due to the risk of kidney failure. I went back to the doctor who said there’s nothing else he can give me except steroids. I’ve been on steroids many times and it never goes well due to my single adrenal gland… basically it throws my whole body off and I get very sick. I am not happy with the fact that I am so young, with so many health problems and no treatment options! I am trying to get a new GI doctor but in the meantime I was hoping someone would have some advice.