Very soon after my mother had radiation treatment to her lungs she caught the pseudomonas bacteria in her lungs. She has been put on colistimethate . The powder she mixes for her breathing treatment. She has been breaking out in itching hives all over and itching to the point of aggravation. When she and I brought this to her doctors attention we were spoken to with attitude and like we were crazy. My mother is also had a couple episodes of chest pain, sharp pain in her side and a lot of involuntary movement while she sleeps. Her doctor said it was ok for her to take Benadryl and I am a little concerned with this to. Should this be something to worry about ?