Hydroxyzine is used to treat itching caused by allergies. It is an antihistamine and works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction. Hydroxyzine may also be used short-term to treat anxiety or to help you feel sleepy/relaxed before and after surgery.
Drowsiness dizziness blurred vision constipation or dry mouth may occur. If any of these effects persist or worsen tell your doctor or pharmacist promptly.
To relieve dry mouth suck (sugarless) hard candy or ice chips chew (sugarless) gum drink water or use a saliva substitute.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects including: mental/mood changes (such as restlessness confusion hallucinations) shaking (tremor) difficulty urinating.
Get medical help right away if you have any very serious side effects including: seizures fast/irregular heartbeat severe dizziness fainting.
A very serious allergic reaction to this drug is rare. However get medical help right away if you notice any symptoms of a serious allergic reaction including: rash itching/swelling (especially of the face/tongue/throat) severe dizziness trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above contact your doctor or pharmacist.
Before taking hydroxyzine tell your doctor or pharmacist if you are allergic to it; or to cetirizine; or to levocetirizine; or if you have any other allergies. This product may contain inactive ingredients which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication tell your doctor or pharmacist your medical history especially of: breathing problems (such as emphysema asthma) high pressure in the eye (glaucoma) high blood pressure kidney problems liver problems seizures stomach/intestine problems (such as ulcer blockage) overactive thyroid (hyperthyroidism) difficulty urinating (for example due to enlarged prostate).
Hydroxyzine may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can rarely cause serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness fainting) that need medical attention right away.
The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may cause QT prolongation. Before taking hydroxyzine tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions: certain heart problems (heart failure slow heartbeat QT prolongation in the EKG) family history of certain heart problems (QT prolongation in the EKG sudden cardiac death).
Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating diarrhea or vomiting. Talk to your doctor about taking hydroxyzine safely.
This drug may make you dizzy or drowsy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive use machinery or do anything that needs alertness or clear vision until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).
Before having surgery tell your doctor or dentist about all the products you use (including prescription drugs nonprescription drugs and herbal products).
Liquid products may contain sugar and/or alcohol. Caution is advised if you have diabetes liver disease or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.
Children may be more sensitive to the side effects of this drug. This drug can often cause excitement in young children instead of drowsiness.
Older adults may be more sensitive to the side effects of this drug especially drowsiness confusion constipation trouble urinating or QT prolongation (see above). Drowsiness and confusion can increase the risk of falling.
During pregnancy this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this drug passes into breast milk. Consult your doctor before breast-feeding.