Could My Difficulty Concentrating, Vision Lapses, And Dizziness Every Couple Of Weeks Be Related To My Effexor And Adderall Medications?

Roughly every 2 weeks or so, I will have a day where I experience difficulty concentrating and general fogginess, but most alarmingly, I will experience frequent split-second lapses of vision, where it feels like my eyes both lose focus all at once. Rarely, this is accompanied by momentary dizziness. I have not fallen over or anything like that. These momentary events only occur on the select days where I am feeling off . I am on Effexor for Anxiety and Adderall for ADHD. I am very worried about this issue. Thank you in advance.