I Have Crohns And Have Been On Azathiaprin Since 2001.

I have Crohns and have been on Azathiaprin since 2001. I was diagnosed with Crohns in early 2000. The doctors put me on Pentasa, but due to adverse reactions I was place on Azathiaprin. This week my subsidy for this medication has expired unbeknown to me or my G.P. I have been placed on Pentasa until we can sort the subsidy number out. Today is my first day on Pentasa and I have been throwing up frequently this afternoon. What can I take to alleviate this reaction. I am already on the maximum dosage of cyclazine