I've been on Ralivia (300 mg) a day. Today my doc changed my med to MS Contin (30mg) 2 x a day?The pharmacist didn`t tell me much except that the two meds are similar. I try to stay away from taking many meds and don`t like to switch meds if it can be helped. Can anyone ease my mind and tell me if these two meds are similar in their make up and dosage??