A round, white, double-scored pill with imprint MYLAN A4 is Alprazolam 2 mg (generic for Xanax)
You will find an image of this pill at mylan.com
Alprazolam is in a class of drugs called benzodiazepines.
Alprazolam is used to relieve anxiety, nervousness, and tension associated with anxiety disorders. Alprazolam is also used to treat panic disorders.