Final answer:
Prescriptions for Schedule III substances typically expire after 6 months or 180 days from the date they are written.
Step-by-step explanation:
In the United States, prescriptions for Schedule III substances typically expire after 6 months or 180 days from the date they are written. Schedule III substances include medications with a moderate to low potential for abuse, such as certain opioids and steroids.
It's important to note that expiration dates for prescriptions can vary depending on state and local regulations. Some states may have stricter expiration requirements, while others may allow for longer expiration periods. Additionally, individual healthcare providers may have their own policies on prescription expirations.
When a prescription for a Schedule III substance expires, it means that the pharmacist can no longer dispense the medication based on that particular prescription. If the patient still requires the medication, they will need to obtain a new prescription from their healthcare provider.