
Hydroxyzine is an oral medication with a range of uses, including treating anxiety and skin conditions. It is also used as a sedative before medical procedures. While it is generally considered safe for adults and children, it can cause mild to severe side effects, including drowsiness, dry mouth, low blood pressure, fatigue, confusion, headaches, and muscle tremors. Some rare but serious side effects include acute generalized exanthematous pustulosis (a severe skin condition), irregular heart rhythms, and convulsions. It is important to consult a healthcare provider to understand the potential side effects and risks associated with taking hydroxyzine.
| Characteristics | Values |
|---|---|
| Muscle Spasms | No evidence found |
| Common side effects | Sleepiness, low blood pressure, fatigue, confusion, dry mouth, headache, muscle tremors |
| Serious side effects | Lengthening of QT interval, acute generalized exanthematous pustulosis, convulsions |
| Side effects requiring immediate medical attention | Changes in heart rhythm, fever, skin rash, worsening of skin problems, chest pain, GI bleeding, blurred vision |
| Side effects requiring emergency help | Symptoms of overdose |
| Precautions | Should not be taken during pregnancy or while breastfeeding, elderly patients are more likely to have side effects |
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What You'll Learn
- Hydroxyzine can cause drowsiness, especially in older patients
- It can also cause dry mouth, which may lead to bad breath
- Nosebleeds are a rare side effect, but they have been reported
- Hydroxyzine may worsen chest pain, especially for those with high blood pressure
- Elderly patients are more prone to unwanted side effects, such as confusion

Hydroxyzine can cause drowsiness, especially in older patients
Hydroxyzine is an oral medication that is FDA-approved for use in adults and children to treat anxiety symptoms, relieve skin itchiness caused by conditions like atopic dermatitis (eczema), and provide sedation before medical procedures. While it is generally well-tolerated, like any medication, it can cause side effects. One of the most commonly reported side effects of hydroxyzine is drowsiness, especially in older patients.
Hydroxyzine belongs to a class of drugs known as antihistamines, which work by blocking the action of histamine, a chemical in the body that is involved in allergic reactions. By blocking histamine, hydroxyzine helps to alleviate allergy symptoms. However, as an antihistamine, hydroxyzine can also cross the blood-brain barrier, which can lead to central nervous system (CNS) depressant effects, including drowsiness.
Older antihistamines, such as hydroxyzine, are more likely to cause drowsiness than newer ones. This side effect may be more pronounced in older patients, who are already more likely to experience unwanted side effects from medications. Additionally, older adults may have age-related liver, kidney, or heart problems, which can further increase the risk of adverse effects.
It is important for patients taking hydroxyzine, especially older adults, to be aware of the potential for increased drowsiness. This side effect can impact daily activities and tasks that require alertness, such as driving. Patients should exercise caution when engaging in such activities until they know how hydroxyzine affects them. If drowsiness becomes a concern, it is recommended to consult a healthcare provider, who may suggest adjusting the dosage or exploring alternative medications.
Furthermore, the risk of drowsiness may be heightened when hydroxyzine is combined with other substances or medications that have CNS depressant effects. These include alcohol, certain medications for allergies or colds, sedatives, tranquilizers, sleeping medications, prescription pain medications, narcotics, and muscle relaxants, among others. It is crucial to consult a doctor before taking hydroxyzine concurrently with any of these substances to ensure safe usage and mitigate the potential for additive drowsiness.
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It can also cause dry mouth, which may lead to bad breath
Hydroxyzine is an oral medication used to treat anxiety symptoms and relieve skin itchiness caused by conditions like atopic dermatitis (eczema). It is also used for sedation before medical procedures. While it is generally considered safe for adults and children, it can cause various side effects, and these side effects can vary depending on the individual.
One of the common side effects of hydroxyzine is dry mouth, which is often mild and manageable at home. Dry mouth, or xerostomia, occurs when hydroxyzine blocks a chemical called acetylcholine, resulting in anticholinergic side effects, including dry mouth. This condition can lead to an increase in bacteria in the mouth, causing bad breath or halitosis. Maintaining good oral hygiene practices can help manage this issue.
In addition to dry mouth, hydroxyzine may cause other side effects such as drowsiness, low blood pressure, fatigue, confusion, headache, and muscle tremors. These side effects typically go away within a few days or weeks. However, it is important to consult a healthcare provider if any concerning or bothersome side effects occur, as they can provide tips on managing them effectively.
While rare, hydroxyzine has been associated with more serious side effects, including lengthening of the QT interval, which can lead to severe or life-threatening arrhythmias. Individuals with heart problems or a family history of heart rhythm issues should exercise caution when taking hydroxyzine. Other serious side effects include acute generalized exanthematous pustulosis, a severe skin condition, and convulsions. It is crucial to seek immediate medical attention if experiencing any symptoms that feel life-threatening.
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Nosebleeds are a rare side effect, but they have been reported
Nosebleeds are a rare side effect of hydroxyzine, but they have been reported in some cases. According to a phase IV clinical study of FDA data, out of 47,188 patients who reported unwanted reactions to the medication, only 234 people (0.5%) experienced nosebleeds. If you experience nosebleeds while taking hydroxyzine, it is important to remain calm and follow these steps:
- Sit upright to reduce blood pressure in the veins around the nose and minimize further bleeding.
- Lean forward to prevent swallowing blood, which can cause stomach discomfort.
- Pinch your nostrils shut with your thumb and index finger and breathe through your mouth for about ten minutes.
- If the nosebleed persists for more than 20 minutes or is accompanied by other symptoms such as dizziness and breathlessness, seek immediate medical attention.
It is important to note that side effects from hydroxyzine may vary depending on the individual. Elderly patients are more likely to experience unwanted side effects, such as confusion and drowsiness, and may require an adjusted dose. Additionally, this medication can cause dry mouth, sleepiness, and headaches. It is generally recommended to avoid drinking alcohol while taking hydroxyzine as it can worsen drowsiness.
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Hydroxyzine may worsen chest pain, especially for those with high blood pressure
Hydroxyzine is an oral medication used to treat anxiety and skin itchiness caused by conditions like atopic dermatitis (eczema). It is also used as a premedication to provide sedation before surgery or other medical procedures. While it is generally considered safe for adults and children, it can cause mild to severe side effects in some individuals.
One of the potential side effects of hydroxyzine is the exacerbation of chest pain, especially in those with underlying conditions such as high blood pressure and QT prolongation. QT prolongation is a heart rhythm problem characterised by lengthened QT intervals, which can lead to severe or life-threatening arrhythmias. Therefore, individuals with QT prolongation or other heart rhythm issues are advised against using hydroxyzine due to the increased risk of adverse events.
In addition to chest pain, hydroxyzine may also cause other cardiovascular symptoms such as dizziness, changes in heart rhythm, and a fast, pounding, or uneven heartbeat. These side effects can be particularly concerning for individuals with pre-existing heart conditions or a family history of heart problems. As such, it is crucial to consult a healthcare provider before taking hydroxyzine to ensure it is safe given one's medical history.
Furthermore, hydroxyzine can interact with other medications, potentially increasing the risk of side effects. Combining hydroxyzine with other QT-prolonging medications, for example, can further elevate the risk of arrhythmias. It is important to disclose all medications one is taking to their doctor to ensure safe prescription and prevent adverse interactions. Additionally, the use of hydroxyzine with substances like alcohol or tobacco may also cause interactions, underscoring the necessity of discussing the use of such substances with a healthcare professional.
While rare, hydroxyzine has also been associated with nosebleeds in some cases. If a nosebleed occurs, it is important to remain calm and follow recommended steps, such as sitting upright, leaning forward, and pinching the nostrils closed. However, if the nosebleed persists for more than 20 minutes or is accompanied by additional symptoms like dizziness and breathlessness, immediate medical attention is advised.
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Elderly patients are more prone to unwanted side effects, such as confusion
Hydroxyzine is a medication used to treat anxiety, allergic reactions, and nausea. It is also used as a premedication to induce relaxation before surgery. While hydroxyzine is beneficial for these purposes, it can cause side effects, particularly in elderly patients. Elderly patients are more prone to experiencing side effects such as confusion, constipation, and dry mouth.
The risk of side effects from hydroxyzine increases for people aged 65 and above. One of the most common side effects in this age group is drowsiness, which can impact an individual's alertness and coordination. As a result, elderly patients taking hydroxyzine are advised not to drive or engage in activities requiring alertness until they know how the medication affects them.
Another side effect that elderly patients may experience is muscle spasms. While not a commonly reported side effect, hydroxyzine can cause an electrolyte imbalance, leading to muscle spasms. Symptoms of muscle cramps may include stiffness, tingling, or weakness. Elderly patients experiencing these symptoms should consult their doctor, as they may require a different dosage or an alternative medication.
In addition to muscle spasms, elderly patients may also experience more severe side effects, such as seizures or convulsions. While rare, hydroxyzine has been associated with these serious reactions, and patients should seek immediate medical attention if they occur. It is important for elderly patients taking hydroxyzine to be aware of these potential side effects and to consult their healthcare provider if they have any concerns.
Furthermore, elderly patients taking hydroxyzine may experience an increased risk of constipation due to their typically slower metabolism. This side effect can be exacerbated by the medication's interaction with other substances. As such, it is crucial for elderly patients to disclose all medications and supplements they are taking to their healthcare provider to ensure safe and effective use of hydroxyzine.
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Frequently asked questions
Hydroxyzine is a medication used to treat anxiety symptoms and relieve skin itchiness caused by conditions such as atopic dermatitis (eczema). It is also used for sedation before medical procedures.
Common side effects of hydroxyzine include sleepiness, low blood pressure, fatigue, confusion, dry mouth, headache, and muscle tremors. Most of these side effects are mild and may go away within a few days or weeks.
Muscle spasms are not listed as a common side effect of hydroxyzine. However, muscle tremors have been reported. Consult your doctor if you experience any unusual symptoms.
Serious side effects from hydroxyzine are rare but can include lengthening of the QT interval, a severe skin condition called acute generalized exanthematous pustulosis, and convulsions. Seek immediate medical attention if you experience any severe or concerning symptoms.
Hydroxyzine may interact with other medications, especially central nervous system (CNS) depressants such as antihistamines, sedatives, or pain medications. It can also cause drowsiness, so caution is advised when performing activities that require full attention, such as driving. Elderly individuals are more prone to side effects and may require adjusted doses. Always consult your healthcare provider for personalized advice.











































