Yes. They can abandon the allegation that it was on school property OR they can reduce it to a misdemeanor under 12.44 (b) of the Texas Code of Criminal Procedure (versus 12.44(a) which allows them to punish as a misdemeanor but it is a felony.)
Moreover, he may even be able to get a pre-trial diversion if he has not been in trouble before & the prosecutor believe this was unusual. This would put him under contract with the state to be good for a year, then the case would be dismissed.
Definitely talk to a lawyer about these avenues - especially pre-trial diversion. Most prosecutors are in on not wanting to ruin a good kid's life.
It is possible to get this charge reduced or even dismissed, but whether or not that happens depends on several factors that include::
- the court the case is set in;
- the prosecutor(s) assigned to the case;
- the particular facts of the case;
- your brother's prior criminal record (including juvenile criminal record);
- how the pill was found (that is, was the search legal);
- whether or not the police/school suspect he was dealing Xanax at school;
- and countless others.
To get a more definitive answer, your brother needs to talk to a local criminal defense attorney as soon as possible to make sure this arrest does not affect the rest of his life.
Disclaimer: This answer is provided as a public service and as a general response to a general question, it is not meant, and should not be relied upon as specific legal advice, nor does it create an attorney-client relationship.