Have you called the ABA? They have all sorts of experts and might be able to rustle up someone who can give you more specific advice.
The best way to increase production is by feeding more often. There are also drugs that increase production. Both of these rely on prolactin - would increased prolactin affect your medication, or is it just that your medication reduces prolactin?
I don't suppose there's an alternative medication you could use?

All the best~~