The Senate voted 23-8 on Tuesday for a 4.8-gram month maximum and an annual cap of 14.4 grams of allergy and cold medicines like Sudafed that could be bought without a prescription.
Over-the-counter remedies that include pseudoephedrine are used to make methamphetamine.
The Senate version is different than the House version, which sets a 5.8-gram monthly cap and annual limit of 28.8 grams. The House passed that version 80-17 earlier this month.
Lawmakers must now work out the differences before the legislation heads to the governor’s desk.
According to the Tennessee Bureau of Investigation, 1,685 meth labs were seized in Tennessee last year.