Exhaust all internal remedies for appeals and remediation. If that has all failed, then ask if they would accept your resignation from the school over a formal dismissal, maybe even beg for a good reference to another pharmacy school--because considering that 99% of the time, the reason a school expels someone, that reason will make no other pharmacy school want to take them either. If that still doesn't satisfy you, then get a lawyer, but know that more than likely, you will have to pay the lawyer upfront, and that you will almost certainly lose your case.