Limits on prescription of controlled substances containing opioids. Prohibits a prescriber providing treatment for a patient in an emergency department of a corporation, facility, or institution licensed, owned, or operated by the Commonwealth to provide health care from prescribing a controlled substance containing an opioid in a quantity greater than a three-day supply, as determined in accordance with the prescriber's directions for use. The bill also prohibits a pharmacist from dispensing a controlled substance containing an opioid pursuant to a prescription issued by a prescriber providing treatment to a patient in the emergency department of a corporation, facility, or institution licensed, owned, or operated by the Commonwealth to provide health care unless the prescription complies with the requirements of the bill. The bill has an expiration date of July 1, 2020.