After months of negotiating how to control Massachusetts' newest legal substance, House lawmakers passed key changes to marijuana regulation on Wednesday.

In a 126-28 vote, representatives approved legislation that would direct $50 million in pot revenues to treating and preventing substance abuse, as well as a 28 percent tax on marijuana products, according to State House News. That taxation rate is more than double the max 12 percent tax approved by voters in November. Advocates of marijuana legislation say that spiked tax rate could lead to a continued cycle of illegal pot dealing outside of retail stores.

Jim Borghesani, a spokesman who helped craft the ballot question to legalize pot, has said the re-legislating and tax hike undermines the regulations that voters passed in November.

Senate chair of Marijuana Policy Committee blasts bill as House chair sits next to her#mapoli pic.twitter.com/5FWXn0eeBK — Gintautas Dumcius (@gintautasd) June 14, 2017

Supporters of #Marijuana legalization upset over bill set for release: "The House bill repeals the will of the voters." --Jim Borghesani — Carl Stevens (@carlwbz) June 19, 2017

The bill also mentions helping those "disproportionately affected" by marijuana's history as an illegal drug to participate in the new Massachusetts industry. An 11-member commission who will study ways to handle marijuana-related issues, such as driving under the influence, is also included in the House's legislation.

Rep. Mark Cusack, who serves as Marijuana Policy Committee Co-Chairman, told State House News that the bill seeks to deliver "common sense" protections for edible marijuana products.

The House legislation reportedly limits childproof-packaged edibles to 10 milligrams of Tetrahydrocannabinol, the key chemical compound in cannabis. The bill also says shops would not separate products for medical and recreational users as other states do in order to "keep footprints small" according to Cusack.

The Senate is expected to wrestle with its version of the bill on Thursday.