For over 10 years i gave worked on "bad" meds doing chtronologies for lawsuits
The first i did was for gadolinium, a contrast used for MRIs. It caused NSF, nephrogenic systemic fibrosis. It has a galf life if 17 hours so it takes a long time to get out of your body or for the kidneys to filtrate it out.
If you are elderly, and ur kidneys are not functioning well or filtrating well, like many elderly, it stays in your system. It ends up in your joints and turns your arms legs into woidy fibrosis, sometimes causing permanent danage.
It us still used today. Big pharma was surd for "failure to

I have a brain tumor and need MRI's often. My doctor always gets mad at me because I refuse to get the contrast. 🤷‍♀️ its my body and they can see it fine without it!