There was a medication that was recalled about 3-5 years ago that caused heart damage. I only wish it had been recalled with less than 25 people damaged from it. You are wrong. The FDA doesn't always know a medication is causing harm to patients.
I would love to know what drug you are describing. I can think of only two drugs that were found to have such profound adverse effects after FDA approval was granted, thalidomide and DMSO, dimethylsulfoxide. BTW, if you're not pregnant, thalidomide can still be prescribed. There is now a more hurried process, justified by compassion, to decide whether or not drugs should be approved for some diagnoses like AIDS, when the prognosis is certain death. Otherwise, obtaining FDA approval is a very prolonged and laborious.