Open Question: What’s the best medication for someone with bipolar and OCD with the least side effects?

So my good sister, bipolar and obsessive-compulsive disorder, she had had ADHD. She has been on and off drugs recently trying to find the real effects of a project, no adverse side effects, but it did not last so well. Her breathing difficulties, loss and side effects of depression, anxiety, mood swings strange, rapid heart beat. She does not want her to development of adverse side effects of overweight, because of her growth and she has issues, and the use of be anorexia. So, what is the best bad side effects of drugs least amount of side effects or without terms such as heart disease and death, which also works with obsessive-compulsive disorder drug?