within about one or so hours after having been injected for a Ct Scan I began to shake uncontrollably and feel very ill and also had severe pain in my coccyx. I had to be admitted to hospital where I was treated with an IV drip containing about 100 mg of prednisone.My creatinine level increased above the normal limits but reverted to normal after about 2 days.I was very listless for about 3 days.