What vitamin supplements to avoid during omeprazole treatment to avoid issues /interactions? is 200 mg magnesium ok? can i take vitamins b, c, d, calcium, zinc to take daily?

Omeprazole and other drugs in its class (proton pump inhibitors) will commonly deplete the body of magnesium. Taking magnesium will likely help with this. A magnesium supplement with a better absorption rate is important. Magnesium citrate, oxide, and sulfate tend to commonly cause loose stools. Magnesium glycinate has a high bioavailability with fewer side effects. 200mg is a reasonable dose.