This exactly. I had to switch pharmacies from Walgreens to another local chain because of this. All of a sudden it seemed like the medication wasn’t working at all. One day I was out and had to use my “backup” meds which were a few months old and I noticed they looked slightly different. Taking them was like the first time I ever took Adderall, literally felt like my heart was going to explode.

I’d suggest filling your next prescription somewhere else and see if that makes a difference. Not just a different location, but a different pharmacy entirely.