Final answer:
A prescription for a Schedule II controlled substance in Maryland must be dispensed within 30 days after the date it was issued to comply with state regulations.
Step-by-step explanation:
In Maryland, a prescription for a Schedule II controlled substance must be dispensed within 30 days after the date of issue. This regulation is in place to ensure that controlled substances are dispensed and used responsibly, minimizing the potential for abuse and diversion. It is crucial for pharmacists and healthcare providers to adhere to these regulations to maintain compliance with state laws and to ensure patient safety.