Imuran

I' m still on Imuran 6 months in now and constantly feel sick and nauseous ,joints feel better though .I am finding it very hard to work feeling like I want to throw up every few minutes .Still on 100mg a day which the nurse advises is a low dose they cant up the dose as I keep being sick. Iron is still low ,cant stomach iron tablets .Blood pressure is up .Feeling really low as there seems no way to improve things .The doc said prednisolone would not be good because of the lung involvement .