I don't have to look up exactly what Massachusetts' statute of limitations is, for medical malpractice or products liability (if your claim is that it's the medicine's fault, not the doctor's, or both), but I would be astonished to find out that either is more than 6 years, and most states only allow 2 to 4 years for these types of lawsuits.  It's too late.

If you think you've been injured, by the negligence of a doctor or anyone else, or by a defective product, you should talk to a lawyer as soon as possible.  If you sleep on your rights, you will lose them.