thanks for using health care magic.
is an antihistaminic drug use to symptomatically relief itches.
It does not treat the underlying condition unless the underlying condition is due to an allergy
Anal itch is most often cause by a worm infection
which promotes re-infection through the feco-oral route due picking up of eggs at the anal region following scratching. It can be treated comfortable with anti worm medicines which your doctor can prescribe.
Anal itch could be due to poor anal hygiene as well.
Hope this helps you