Unless the pharmacist gave you the original bottle it was packaged in from the manufacturer, then you won't have the lot number. If you have any concerns, take it back to the pharmacy that dispensed it. They should have records of what lot was dispensed to you. If they don't, then they have to take it back and exchange it with another lot; returning what you gave them to the manufacturer.

Kristin
Alex 18-GAD, mood disorder, ADHD - Abilify Maintena 400mg
Matthew 16-ADD 40mg Vyvanse