Lashon Hara and Do Not Stand Idly By Your Neighbor's Blood

Hello, I was referred by a doctor to take a certain medication that caused me side effects that interfere with functioning. I approached the doctor to see what could be done, and she behaved very rudely, insisting that the side effects were not related to the medication even though they are listed in the consumer leaflet, and yelled at me that if I want, I can stop the treatment and the problem would return, and I would not progress with the issue. Since her entire attitude was terrible and humiliating, and I couldn't have a conversation with her, I approached a family doctor and told him the whole story. He checked my file and saw that the doctor had written that I complained about side effects and therefore she recommended stopping the treatment. This is a blatant lie. I want to complain about the disgraceful attitude and also about her lying to protect herself, and if it weren't for the doctor, I wouldn't have known, and if something had happened, God forbid, she would say in her defense that she recommended stopping the medication and she is not responsible, even though she actually told me to continue and that it is not related to the medication. Is it permissible and necessary to complain in terms of Lashon Hara so that she does not harm others? I understood from her secretary that the disgraceful attitude I received from the doctor is not uncommon, and she also had to really argue with her to get me in (she was angry and screamed because I came without an appointment to get in between appointments since she only has appointments in 8 months and I couldn't wait with the side effects).

Hello and blessings,

It is permissible to complain about her behavior.