I came down with a cold/flu after Thanksgiving (even though I got a flu shot!) It turned into a sinus infection/bronchitis. My doctor prescribed azithromycin (generic for Zithromax, sometimes called a Z-pack.) I kept getting sicker and sicker. I had not paid much attention to the warning labels on the bottle since I've used Zithromax before. About 5 days after starting the medication, I read the labels on the bottle:
"Do not take aluminum or magnesium
supplements or antacids while taking this medication."
I had stayed OP while ill, including taking my supplements faithfully. After I read the warning label, it dawned on me that the IP Cal-Mag and the IP Multi both contain magnesium. I called my doctor, and she had me stop the IP supplements. As soon as I stopped taking the supplements, the antibiotics kicked in.
An expensive lesson. I try to not take antibiotics unless there's no other alternative. My doctor had to prescribe a second dose, and I was ill and off work longer than necessary. So, always read the warning labels on prescriptions.