Hey as per my idea Atarax is the Brand name for Hydroxyzine HCL and here I am giving you its details

Hydroxyzine
Hydroxyzine reduces activity in the central nervous system.
It also acts as an antihistamine that reduces the natural chemical histamine in the body.
Histamine can produce symptoms of sneezing and runny nose, or hives on the skin.

Uses
Hydroxyzine is used for the relief of pruritus (itching) caused by various allergic conditions.
Hydroxyzine is also used for treating anxiety and tension, and inducing sedation prior to or after anesthesia. Nausea, vomiting, and alcohol withdrawal are also uses for hydroxyzine

Side effects
Epilepsy or other seizure disorder;
Asthma, emphysema, or other breathing problem;
Glaucoma;
Heart disease or high blood pressure;
Stomach ulcer, blockage in your stomach or intestines;
Thyroid disorder;
Enlarged prostate or problems with urination;
Liver disease; or
Kidney disease.