State Sen. Travis Fitzwater, a Republican from Holts Summit

State Sen. Travis Fitzwater, a Republican from Holts Summit, presents legislation to a Senate committee on Wednesday.

With billions of dollars at stake, a legislative battle in Missouri over payments for prescription drugs kicked off again Wednesday between pharmacies, health care providers and insurance companies.

For those unfamiliar with the conflict, terms like white baggingbrown bagging340B and biosimilarity can make the debate impossible to fathom. But each of those phrases, and others equally baffling, play a part in how much patients and insurers pay and whether they can get their prescriptions from their favorite pharmacy.