I agree with your comments, Colorado. By researching, I found information that hydroxyzine pamoate (the capsule form) crosses the blood/brain barrier, whereas hydroxyzine hydrochloride (the tablet form) does not. Lists the various brand names available for medicines containing hydroxyzine pamoate. Find information on hydroxyzine pamoate use, treatment, drug class and molecular formula. Brand Names: Atarax, Rezine, Vistaril Generic Name: hydroxyzine. What is hydroxyzine (Atarax, Rezine, Vistaril)? What are the possible side effects of hydroxyzine (Atarax, Rezine, Vistaril)? Hydroxyzine, sold under the brand names Atarax among others, is a medication of the antihistamine type. It is used in the treatment of itchiness, anxiety, and nausea, including that due to motion sickness. It is used either by mouth or injection into a muscle. VISTARIL ® (hydroxyzine pamoate) Capsule and Suspension. DESCRIPTION. Hydroxyzine pamoate is designated chemically as 1-(p-chlorobenzhydryl) 4- [2-(2-hydroxyethoxy) ethyl] diethylenediamine salt of 1,1′-methylene bis (2 hydroxy- 3-naphthalene carboxylic acid). Hydroxyzine reduces activity in the central nervous system. It also acts as an antihistamine that reduces the effects of natural chemical histamine in the body. Learn about Hydroxyzine Pamoate (Generic Vistaril), dosing, proper use and what to know before beginning treatment Pyrantel pamoate (also called Strongid, Nemex, and many other brand names) is most commonly used to treat hookworms and roundworms in dogs and cats. Roundworms and hookworms are typically picked up by pets when they ingest contaminated soil or feces or eat an infected prey animal. Puppies and Vistaril is the brand name for hydroxyzine pamoate, a prescription drug used to treat anxiety and tension, nausea and vomiting & severe itching. Brand-name Vistaril is manufactured by Pfizer, Inc. The patents for this medication have expired, and generic versions are available.