Allergic Reactions
"Phenergan (promethazine) is very effective for nausea and vomiting. It is generally not used for urticaria or respiratory allergies. It is very strong and will make you drowsy. I recommend taking it when you are going to lay low for a while. We don&#039;t give it IV any more because we had some serious tissue damage reported when it infiltrated under the skin. I am not sure that we still give it IV. Lately, it is either given as a suppository or as a pill."