Before taking this medicine You should not use Vistaril if you are allergic to hydroxyzine, or if: skin rash. O 0Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.Some side effects may not be reported. Stop using Vistaril and call your doctor at once if you have a serious side effect such as tremors, confusion, seizures, or restless muscle movements in your eyes, tongue, jaw, or neck. Atarax (hydroxyzine)" Pfizer US Pharmaceuticals, New York, NY. This is not a complete list of side effects and others may occur. Pfizer US Pharmaceuticals, New York, NY. Side effects of Vistaril and Valium that are similar include dizziness, drowsiness, blurred vision, and dry mouth. Vistaril (hydroxyzine)." Available for Android and iOS devices.We comply with the HONcode standard for trustworthy health information - Common hydroxyzine side effects may include: drowsiness; headache; dry mouth; or. Fast or irregular heartbeat Difficulty passing urine Seizures Slurred speech or confusion Tremor Trouble breathing Muscle weakness Increasing anxiety Hallucinations. RARE side effects. Applies to hydroxyzine: oral capsule, oral syrup, oral tabletOther dosage forms: 1. intramuscular solutionAlong with its needed effects, hydroxyzine (the active ingredient contained in Vistaril) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.Check with your doctor immediately if any of the following side effects occur while taking hydroxyzine: "Product Information. If experienced, these tend to have a Less Severe expressionIf experienced, these tend to have a Severe expressionIf experienced, these tend to have a Less Severe expressionSelected from data included with permission and copyrighted by First Databank, Inc. Common side effects of Vistaril include: dizziness, drowsiness, blurred vision, dry mouth, stomach upset, or headache. Side effects such as drowsiness and confusion may be more likely in older adults. Applies to hydroxyzine: oral capsule, oral syrup, oral tabletOther dosage forms: 1. intramuscular solutionAlong with its needed effects, hydroxyzine may cause some unwanted effects. If experienced, these tend to have a Severe expression. Although not all of these side effects may occur, if they do occur they may need medical attention.Check with your doctor immediately if any of the following side effects occur while taking hydroxyzine: Call your doctor for medical advice about side effects. A Type Of Skin Disorder Called Acute Generalized Exanthematous Pustulosis. 3. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.Things to remember when you fill your prescription.WebMD does not provide medical advice, diagnosis or treatment. Vistaril is an antihistamine with anticholinergic (drying) and sedative properties and Valium is a benzodiazepine. You may report side effects to FDA at 1-800-FDA-1088. Drinking alcohol can increase certain side effects of Vistaril. Side effects of Vistaril that are different from … Along with its needed effects, hydroxyzine (the active ingredient contained in Some side effects of hydroxyzine may occur that usually Check with your health care professional if any of the following side effects The most commonly reported side effects included sleepiness, headache, and tiredness.1. You may report them to the The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. "Product Information. 2. Cerner Multum, Inc. "UK Summary of Product Characteristics."