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Medications to treat anxiety generally fall into two classes: SSRIs which are longer-acting medications that one takes daily (including drugs like Zoloft, Paxil, Prozac, etc.) and benzodiazepines which are shorter-acting medications that one takes only as needed (including drugs like Xanax and Ativan).
While these medications are the ones most commonly prescribed for anxiety, they would not address the pruritis that you are experiencing. For more information about this and ways to treat other symptoms associated with your cirrhosis, I would suggest consulting your GP rather than a mental health professional.