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  • Load image into Gallery viewer, Hydroxyzine
  • Load image into Gallery viewer, Hydroxyzine


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What is this medication?

 Histamine H1 Antagonist 

Brand Name US: Vistaril
Canadian Equivalent: Atarax

Hydroxyzine is indicated for the management of allergic reactions, antiemetic, and anxiety.

How does this medication work? 

VISTARIL/ATARAX (Hydroxyzine) competes with histamine for H1-receptor sites on effector cells in the gastrointestinal tract, blood vessels, and respiratory tract.  Hydroxyzine, Vistaril exhibit muscle relaxation, bronchodilator, antihistamine, antiemetic, and analgesic properties.

How should I take this medication? 

Oral: Take 25mg to 100mg 4 times daily.

How to Take: Take with or without food.

What should I watch for while using this medication? 

Before starting VISTARIL/ATARAX (Hydroxyzine), make sure your physician is aware of any allergies and medications you currently take.  There are a few rare adverse events that have occurred with Hydroxyzine including acute generalized exanthematous, drowsiness and QT prolongation.

What if I miss a dose?

If you miss a dose of medication, try to take it as soon as possible. However, if it is almost time for your next dose, take only that scheduled dose. Do not take double or extra doses.

How should I store this medication?

Keep out of the reach of children at all times. Store at room temperature, 59 to 86° F (15 to 30° C). Protect from light. Keep the container tightly closed. Properly dispose of any unused medication after the expiration date.

What are the possible side effects of using this medication?

The incidence of side effects has not bee well defined, however drowsiness, xerostomia, and respiratory depression (high doses) have been observed.

Note this is not a complete list of side effects for VISTARIL/ATARAX (Hydroxyzine), only common ones.