Intramuscular injection of phenergan is a breach of standard care. The hospital may well be liable. You need to consult with a medical malpractice lawyer immediately. Do not try to handle this yourself. Risk management is going to run out the clock on the statute of limitations if they can.
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I am not familiar enough with the drug to know what the standard of care is regarding its use, and would defer to my colleague regarding this. I would say however that you should consult a medical malpractice attorney in your area to determine if in fact you have a cause of action.
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