It is not appropriate to compare the equivalent dose between Valium (diazepam) and Xanax (alprazolam) based solely on their mg strength as they are two different medications with different potencies and pharmacokinetics.
The appropriate dose of each medication should be determined by a healthcare professional based on a variety of factors, including the individual's medical history, symptoms, and response to the medication.
It is not recommended to switch between medications or adjust doses without the guidance and approval of a healthcare professional, as this can result in dangerous side effects and potentially harmful interactions.