Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It works great!

This has been a really bad allergy season for my six little terriers. Diphenhydramine (Benydryl generic) stopped helping four of them and they were tortured by itchy haunches to the point of pulling out big chunks of hair. My vet recommended trying Clemastine before getting into steroids. The Clemastine works great--1/2 of a 1.34 mg tab every 12 hours. It is crucial to time the doses close to 12 hours. This seller has been fast and reliable, I'm ordering again today.