Modifies provisions relating to limits on selling or purchasing certain drugs

HB 1311 sets strict limits on the over-the-counter sale of drugs containing ephedrine, phenylpropanolamine, or pseudoephedrine (common methamphetamine precursors). It limits sales to 7.2 grams per 30 days, 3.6 grams per 24 hours, and 61.2 grams per year per person, regardless of transaction count. The bill requires these products to be sold only behind pharmacy counters by licensed staff, prohibits prescriptions for amounts within these limits, and mandates pharmacies to report sales to law enforcement. It preempts stricter local laws and applies to individuals purchasing or pharmacies selling these substances.