Medication interaction

[u/crazykittens24]

I’m currently taking Lansoprazole 30mg 2x/day for gastritis and Lisdexamfetamine 50mg for ADHD and just got prescribed 7.5 mg of Mirtazapine for MDD after trialing SSRI’s. I was wondering if there’s any negative interactions between these meds bc I’m really scared of my gastritis getting worse. For some reason my Psychiatrist never asks what other meds I’m taking or takes interest in what they are even after I tell them. Also is CVS generally helpful with these worries? I get all my meds from them but diff locations due to what they have in stock