ulcerative colitus

Please can anyone advise me. My son has been diagnosed with UC and is on aziathpreen but keeps vomiting violently, the IBD nurse says theres nothing they can give him. Can anyone give any advice on what he can take,do just to help?! Thank you x

Thankyou for your concern and help. My son is in his late 20's has been on the mdication since Nov last year had to come off them as he got a lung infection. Back on them about 4 weeks now having his bloods checked weekly but started vomiting violently 4 days ago and can't keep anything down and totally run down now. Just want to be able to help hi but feel helpless !