I'm not sure your meltdowns can be medicated away. Medication is good but this is a behavior you have been doing for years. It is your automatic response to stress now. Medication will not reduce your stress. If you are having these meltdowns when you are not in an episode, they are not necessarily bipolar related. I have outbursts when I am extremely agitated (usually in a mixed episode) but not any other time.

I suggest trying to learn some dbt skills, especially distress tolerance. DBT (dialectical behavior therapy) has been helpful for me in learning how to control my outbursts. Generally when I feel myself getting worked up I will find a way to remove myself from the situation, even just for a minute or two. Then I will use distress tolerance skills such as becoming aware of my breath or holding some ice or hugging myself to reduce my anxiety and stress. Then I will go back to the situation calmer, and if it happens again I will do it over again.

There are classes you can take but generally you have to pay (or your insurance does) and it will take up your time one to three times a week. But I think it's worth it. However there is also a book called dialectical behavior therapy workbook for bipolar that can help start teaching you some skills.