I'm seeing a new psychiatrist in less than two weeks and I'm wondering how long does new medicine take to work. I currently take 32 mg of perphenazine, 3 mg of risperdal, 600 mg of trileptal, 80 mg of latuda and 1 to 2 mg of Ativan if necessary. I want something for my depression. I don't know if anti-depressants are good for bipolar disorder.