Not on Adderall until September is it safe to consume alcohol?

I have ADHD and take Adderall XR (25mg) (Mon-Fri for school I take my Adderall at 630am EST) to help me focus. I have not been taking the pill daily for about a month now, but I took one yesterday and last thursday for exams and I will not be taking Adderall until September. Is it safe to consume alcohol? No, I am not mixing alcohol and Adderall, and I will not be taking the Adderall that day or anytime soon. Thanks.