I have a RX for 2 mg Xanax. I get the generic Alprazolam, green bar, s 90 3. It is marked with 3 score lines, but I am not sure what they mean or if it is okay to cut it in half or 3rds. 2 mgs works great for me if I am having an anxiety attack, but if I just need help falling asleep, it is too much. I end up with a "hangover" the next morning.