An antipruritic is a medical agent which stops itching.

Medication to stop or control itching

anti-anxiety; preoperative sedative; antipruritic.

Research: http://www.umm.edu/altmed/drugs/hydroxyzine-065900.htm

Pramoxine hydrochloride is a topical anesthetic that is used as an antipruritic.

Triamcinolone based creams are actually used in veterinary medicine as an anti-inflammatory, antipruritic, and antibacterial medication for the treatment of skin conditions. That said, you're still supposed to avoid ingestion.

You should contact your Vet.