If you were doing fine and your Dr. gave you some pills to take that actually made you worse, would you keep taking them?

Someone I know was given blood thinners which the Dr. said would keep them from having a stroke or heart attack but, when they DON'T take them, they feel perfectly fine!! However, when they DO take them, they get chest pains that make them wonder if a heart attack is coming on! Would YOU continue taking them?
They noticed that these pains were coming after they started taking these pills so, they decided to stop taking them for a week or so to see if the pain would go away, and it did! The next time they saw the Dr., they were told it's to keep them from having a heart attack or stroke!! So, they started taking them again, this time, half as often as "needed" and the pains started coming back!
If you were doing fine and your Dr. gave you some pills to take that actually made you worse, would you keep taking them?
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