Suggest Treatment For Allergic Reaction In A Child

Hello Doctor, I am from US. My two and half year old daughter is allergic to tree nuts and eggs and she had a sever reaction two weeks back for nuts. Her mouth,tongue and eyes swelled and she started to vomit and was almost choking and she was saying her throat is tightening. We were prescribed epi-pen and benydryl but they are just first aids. We would like to know is there any cure for this? Kindly let us know.