A prescription drug bill touted by lawmakers to crack down on so-called “pill mills” dispensing prescription pain medication has been challenged in federal court, according to the Associated Press.

The lawsuit says the new legislation infringes on the right of the uninsured to get more than a three-day supply of pain medication, and free speech by limiting advertising by clinics, according to the AP report.

Tough new laws on pain clinics are set to take effect Oct. 1 which establish guidelines for dispersing powerful prescription pills such as Oxycontin and Xanax.

Legislators took on the issue during the last legislative session in response to a record number of overdose deaths associated with prescription pain pills last year.