I think that most bi-polars that are committed to working on their wellness program can relate to the months and sometimes years or finding the correct cocktail for themselves.
A lot of tinking and adjusting needs to be done and that is through frequent visits with your pdoc.
Maybe you could ask to be started on very low dosages of any new drugs until you are comfortable with how it makes you feel before you make an increase in it's dosage or just find it unacceptable.
My sister who is also bipolar stopped taking her medications for the same reason as you. She tried this approach and feels a lot more in control and confident in her medication adjustments because now she is telling her pdoc that this drug just makes me too tired, too crabby or whatever and sometimes she know that, hey this drug is helping me somewhat and I think I need a little more of it. So she really feels in control in the decision making with her pdoc.
Also I am a big supporter of intergrating talk therapy into my wellness plan. It has helped me tremendously.