I am sorry to hear about your condition. Most importantly, you should know that there is a 2 year Statute of Limitations on Medical Malpractice claims. If you were aware of your injuries related to the treatment more than 2 years ago, then your claim is too late.
A physician is required to disclose to a patient all relevant potential side effects to the proposed treatment. In general, the patient signs a very comprehensive informed consent form that would cover those issues.
If you are not barred by the statute of limitations, you should consult promptly with a personal injury attorney.
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