Wood chairs the Committee on Health in the Assembly. "If you can't understand what's going on, how could you possibly make efforts to change that?" he said.

Pharmaceutical manufactures frequently argue that drug prices are high because it's expensive to conduct the scientific research and development that is necessary to bring a drug to market. But Wood says we can't simply take their word on that.

"I would personally love to know how much they spend on advertising and marketing, versus how much they spend on R&D," he said.

Drug industry representatives and researchers visited the Capitol Wednesday to meet with lawmakers and promote their contributions to the California economy. The pharmaceutical industry employs more people in California than any other state (145,880 jobs), according to Priscilla VanderVeer, a spokeswoman with Pharmaceutical Research and Manufacturers of American.

VanderVeer said SB 17 won't do anything to help consumers. "If the problem is that patients are having a hard time affording their medicines, which we know they are, then let’s come to the table and talk about solutions that can actually help them," she said.

VanderVeer said one problem is that consumers often must pay the full list price of a drug, even if they are insured.

"Oftentimes when a patient goes to the pharmacy counter and they haven’t reached their deductible, or they have a co-insurance on their drugs, they’re paying that off the list price, not the negotiated rate their insurance has," she said. VanderVeer says that doesn't happen to insured patients in other parts of the health care system.

"I give the example of the hospital. You know the $350 x-ray that your insurance brings down to $50, and then you pay your cost-sharing off the $50. That’s not happening with your drugs, that’s not happening at the pharmacy counter," she said.

VanderVeer also criticized the bill for ignoring other parts of the pharmaceutical supply chain that also affect prices.

"You’ve also got pharmacy benefit managers and insurers who negotiate the price significantly down, I might say, and then you also got wholesalers who purchase drugs directly and keep them in their warehouses and disseminate them to pharmacies. And then you’ve got pharmacies," VanderVeer explained. She said those links in the supply chain account for one-third of the final price.

Assemblyman Wood agrees that California should pay more attention to pharmacy benefit managers, companies that act as middlemen, negotiating purchase contracts with drug manufacturers on behalf of health plans. Wood has introduced a different bill in the Assembly that would require pharmacy benefit managers to be licensed in California. It would also require them to disclose information about their business practices, including rebates and hidden "clawback" arrangements that force patients to unwittingly pay more for drugs.