How long does it take for hydroxyzine to wear off

It is used to treat anxiety. It is used to put your child to sleep for surgery. It is used to treat mood problems. It is used to treat upset stomach and throwing up. It may be given to your child for other reasons. Talk with the doctor.

How long does it take for hydroxyzine to wear off. Pharmacological and clinical studies indicate that hydroxyzine in therapeutic dosage does not increase gastric secretion or acidity and in most cases has mild antisecretory activity. Hydroxyzine is rapidly absorbed from the gastrointestinal tract and hydroxyzine pamoate's clinical effects are usually noted within 15 to 30 minutes …

How long does hydroxyzine stay in your system? After you begin taking hydroxyzine, you may begin to feel the effects within 30 minutes of your first dose [1] . When you stop taking hydroxyzine, the medication will …

• Priapism (an erection in males that does not go away after 4 hours) • Skin rash known as acute generalized exanthematous pustulosis (AGEP) Are there any risks for taking hydroxyzine for long periods of time? To date, there are no known problems associated with the long-term use of hydroxyzine. It is a safe and effective medication whenHow long does hydroxyzine last for anxiety? The effects of hydroxyzine typically last 3 to 4 hours. Is 25 mg of hydroxyzine strong? The recommended dose of Vistaril for treating itch (pruritus) is 25 mg, 3 or 4 times daily. For sedation, the recommended dose is 50 to 100 mg.These sustainable bathing suit brands are helping the environment one piece at a time. Fashion is more than just showcasing our personal style. In recent years, the clothing we wea...Across the three levels of exposure to hydroxyzine, we found significant increasing trends of disorders in tic, anxiety and disturbance of conduct from short-term to long-term users. Specifically, the proportion of tic disorders goes from 3.77% in short-term user to 5.68% in frequent user; anxiety from 4.21 to 5.41%; and conduct disorder from 5 ...Pharmacological and clinical studies indicate that hydroxyzine in therapeutic dosage does not increase gastric secretion or acidity and in most cases has mild antisecretory activity. Hydroxyzine is rapidly absorbed from the gastrointestinal tract and its clinical effects are usually noted within 15 to 30 minutes after oral administration ...Hydroxyzine is prescribed for allergic reactionsor symptoms associated with allergies that are driven by histamine reactions (such as hives and itchy skin). Anxiety, while not an allergic reaction, may also be driven by histamine receptors in the central nervous system (CNS). Because of this common link, … See moreKotan et al. was the only study reviewed to have a worsened SL in the hydroxyzine treatment group, with a difference of 14.7 min compared to placebo. As these patients were prescribed hydroxyzine prior to study initiation, this finding may suggest that long-term use of hydroxyzine has a negative effect on SL (Kotan et al., 2015).

Find information on Hydroxyzine (Vistaril) in Davis’s Drug Guide including dosage, side effects, interactions, nursing implications, mechanism of action, half life, administration, and more. Davis Drug Guide PDF. Try the app for 14 days! INSTALL. Skip to main content navigation Skip to main content.Google has a slew of new features designed to improve connectivity, productivity and accessibility for Android, Chromebook and Wear OS. Image Credits: Brian Heater Google has annou...Oral. Symptomatic relief of anxiety: 50–100 mg qid. Management of pruritus: 25 mg tid–qid. Sedative (preoperative and postoperative): 50–100 mg. IM. Psychiatric and emotional emergencies, including alcoholism: 50–100 mg immediately and q 4–6 hr as needed. Nausea and vomiting: 25–100 mg. Preoperative and postoperative, prepartum and ...Feeling confused. Rarely, a very bad skin reaction has happened with hydroxyzine injection. Signs include fever and many small skin spots within large areas of redness and swelling. Call your doctor right away if you have a rash or any of these signs. Tissue damage has happened with hydroxyzine injection.Antihistamines are a pharmaceutical class of drugs that act to treat histamine-mediated conditions. There are two main classes of histamine receptors: H-1 receptors and H-2 receptors. Antihistamine drugs that bind to H-1 receptors are generally used to treat allergies and allergic rhinitis. Drugs that bind to H-2 receptors can treat …Are you wondering what to wear with large prints? Find out what to wear with large prints in this article. Advertisement One trend that never seems to go out of style is the print....Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. Shake the Vistaril® oral liquid well before using. Measure the oral liquid with a marked measuring spoon, oral syringe, or medicine cup.

How long does it take for hydroxyzine to wear off? ... How long does hydroxyzine stay in your system? This drug is an antihistamine, which means a standard drug test will not screen for this medication. However, hydroxyzine and other antihistamines may result in a false positive for other substances during a routine drug …You should wait at least two to three days after the last dose of hydroxyzine before consuming alcohol. Hydroxyzine is an antihistamine prescribed to …Aug 21, 2023 · When you first start taking hydroxyzine, avoid activities that need your full attention, like driving, until you know its effects. You should also avoid other medications and substances that can worsen or amplify drowsiness. Examples include opioids, benzodiazepines, and alcohol. Some people may only need to take hydroxyzine once a day. Descriptions. Hydroxyzine is used to help control anxiety and tension caused by nervous and emotional conditions. It can also be used to help control anxiety and produce sleep before surgery. This medicine is also used to relieve symptoms of allergic conditions (eg, chronic urticaria and atopic and contact dermatoses).Benadryl has an average rating of 7.3 out of 10 from a total of 78 ratings on Drugs.com. 65% of reviewers reported a positive effect, while 18% reported a negative effect. Hydroxyzine has an average rating of 5.7 out of 10 from a total of 1375 ratings on Drugs.com. 46% of reviewers reported a positive effect, while 36% reported a negative …Side Effects. Drowsiness, dizziness, blurred vision, constipation, or dry mouth may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To relieve dry mouth ...

Kroger mud lane.

Your hydroxyzine dosage depends on your age, medical conditions, and your response to the medication. Most adults take between 25 mg and 100 mg of hydroxyzine 3 to 4 times per day. Hydroxyzine is typically only meant for short-term use. Talk to your healthcare team if your symptoms aren’t improving or you need a long-term solution.This risk is highest if you take more than 4 mg of alprazolam per day. However, withdrawal symptoms may also be possible with long-term use (more than 12 weeks) of lower doses. What are the differences between hydroxyzine and Xanax? There are similarities and differences between hydroxyzine and alprazolam.hydrOXYzine Pharmacokinetics Absorption Bioavailability. Rapidly absorbed following oral administration. Onset. Onset of sedative action is 15–30 minutes following oral administration.Hydroxyzine is an anti-histamine medication which has been used in the treatment of anxiety. Objectives: 1. To determine the efficacy of hydroxyzine in comparison with placebo or any other active agent in alleviating the acute symptoms of GAD. 2. To review acceptability of treatment with hydroxyzine in comparison with placebo or any …

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Storage . Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.However, hydroxyzine and other antihistamines may result in a false positive for other substances during a routine drug screening. The effects of histamine reduction can last for over 24 hours in some people but for many people about 12 hours while the other effects of hydroxyzine last closer to 3-6 hours.How long does it take to work? Hydroxyzine begins working as soon as you take your first dose. Its sedative effects begin about 30 to 45 minutes after you take a dose.How long does hydroxyzine stay in your system? Hydroxyzine will stay in your system for about 100 hours, on average, but its clinical effect may wear off before …She was started on hydroxyzine 50 mg at an unspecified interval and took it for 3 to 5 days with no effect on milk production. She was then started on aripiprazole 5 mg at an unspecified interval. After 5 days, she reported a decrease in milk production that required supplementation with formula.Hydroxyzine benefits are felt quickly, usually within 15-30 minutes. If you are taking it to help you sleep, you should take it when you are ready for bed. It reaches peak levels after 2 hours, and most effects are no longer noticeable by 4-6 hours. Hydroxyzine can help you go to sleep, and may also help you sleep through the night.Hydroxyzine is not known to interfere with the action of digitalis in any way and it may be used concurrently with this agent. The effectiveness of hydroxyzine as an antianxiety agent for long-term use, that is, more than 4 months, has not been assessed by systematic clinical studies.Dosing: Adult. Antiemetic: IM: 25 to 100 mg/dose. Anxiety: Oral: Manufacturer’s labeling: 50 to 100 mg 4 times daily. Alternative recommendations (off-label dosing): 37.5 to 75 mg daily in divided doses (WFSBP [Bandelow 2008]; WFSBP [Bandelow 2012]) IM: Initial: 50 to 100 mg, then every 4 to 6 hours as needed.Mar 1, 2024 · Hydroxyzine will stay in your system for about 100 hours, on average, but its clinical effect may wear off before this time. Hydroxyzine has a half-life of about 20 hours. The half-life of a drug is the time it takes for the plasma (blood) concentration to be reduced by 50% from its original value. Hydroxyzine is available as tablets, capsules, and an oral solution. It also comes as an intramuscular (IM) injection that can be given in a healthcare setting. Depending on why you’re taking it, adults may take 25 mg to 100 mg of hydroxyzine up to 3 or 4 times a day, as needed. The maximum daily dosage also depends on why you’re …

Generic name: Hydroxyzine Capsules and Tablets [ hye-DROX-i-zeen ] Brand names: Atarax, Vistaril. Drug classes: Antihistamines, Miscellaneous anxiolytics, sedatives and hypnotics. Medically reviewed by Drugs.com. Last updated on Sep 8, 2023. Uses.

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Storage . Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.Mar 13, 2024 · Usual Adult Dose for Anxiety. Oral: 50 to 100 mg orally 4 times a day Parenteral: 50 to 100 mg IM immediately, then every 4 to 6 hours as needed Aug 29, 2023 · Pediatric hydroxyzine dosages are usually smaller. Kids younger than 6 years old typically take 50 mg every day in divided doses. Older kids may take up to 100 mg daily in divided doses. How long does it take for hydroxyzine to start working? Pharmacological and clinical studies indicate that hydroxyzine in therapeutic dosage does not increase gastric secretion or acidity and in most cases has mild antisecretory activity. Hydroxyzine is rapidly absorbed from the gastrointestinal tract and its clinical effects are usually noted within 15 to 30 minutes after oral administration ...Hydroxyzine is available as tablets, capsules, and an oral solution. It also comes as an intramuscular (IM) injection that can be given in a healthcare setting. Depending on why you’re taking it, adults may take 25 mg to 100 mg of hydroxyzine up to 3 or 4 times a day, as needed. The maximum daily dosage also depends on why you’re taking it.However, as the effects of the medication will wear off after several hours, patients may be prescribed the drug to take on a regular basis, to help keep their symptoms under control. In patients experiencing panic attacks relating to an anxiety disorder or insomnia from anxiety, 50 mg to 100 mg may be administered once, rather than on a ...Jun 24, 2022 · Anxiety, panic attacks, and tension. Flushing from the dilation of veins. Coughing. Lung and gastrointestinal contraction (such as asthma, intestinal cramping, or diarrhea) Hives, rashes, and other anaphylaxis symptoms. Because it is an antihistamine, hydroxyzine suppresses the effects of histamine. Side Effects. Drowsiness, dizziness, blurred vision, constipation, or dry mouth may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To relieve dry mouth ...

Rodney orr autopsy.

Tesla stock predictions 2023.

Pharmacological and clinical studies indicate that hydroxyzine in therapeutic dosage does not increase gastric secretion or acidity and in most cases has mild antisecretory activity. Hydroxyzine is rapidly absorbed from the gastrointestinal tract and Vistaril’s clinical effects are usually noted within 15 to 30 minutes after oral administration.She was started on hydroxyzine 50 mg at an unspecified interval and took it for 3 to 5 days with no effect on milk production. She was then started on aripiprazole 5 mg at an unspecified interval. After 5 days, she reported a decrease in milk production that required supplementation with formula.The TSA isn't messing around. At this point in the pandemic, we shouldn’t need to tell you (again) why it’s important to wear a face mask while on a plane. This is not a new concep...Here's what experts recommend about children wearing face masks while traveling. Plus, there's a chance the mask your child wore on your last flight may no longer be approved. Sinc...In healthy users, hydroxyzine should leave the body after around 100 hours—a little over four days. Patients who experience drowsiness or other effects …For oral dosage form (capsules, tablets, or solution): For anxiety and tension: Adults—50 to 100 milligrams (mg) 4 times a day. Children 6 years of age and older—50 to 100 mg per day given in divided doses. Children younger than 6 years of age—50 mg per day given in divided doses. For management of allergic reactions:Hydroxyzine is an anti-histamine medication which has been used in the treatment of anxiety. Objectives: 1. To determine the efficacy of hydroxyzine in comparison with placebo or any other active agent in alleviating the acute symptoms of GAD. 2. To review acceptability of treatment with hydroxyzine in comparison with placebo or any …Hydroxyzine Hydrochloride Tablets, USP are available as follows: 10 mg tablets: round, film coated white tablets. Debossed H on one side and 500 on the reverse side. ... The effectiveness of hydroxyzine as an antianxiety agent for long term use, that is more than 4 months, has not been assessed by systematic clinical studies. The physician ... Hydroxyzine (Oral) Brand Names: Atarax, Rezine, Vistaril. Hydroxyzine reduces activity in the central nervous system. It also acts as an antihistamine that reduces the effects of natural chemical ... Side Effects. Drowsiness, dizziness, blurred vision, constipation, or dry mouth may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To relieve dry mouth ... ….

How long does it take hydroxyzine to wear off? Hydroxyzine’s half-life is about 14 hours. So it takes about 14 hours for your body to get rid of half of a dose of hydroxyzine. Typically, it takes about five half-lives for a drug to completely leave your system. For hydroxyzine, this means the drug will stay in your system for about 70 …Dosing: Adult. Antiemetic: IM: 25 to 100 mg/dose. Anxiety: Oral: Manufacturer’s labeling: 50 to 100 mg 4 times daily. Alternative recommendations (off-label dosing): 37.5 to 75 mg daily in divided doses (WFSBP [Bandelow 2008]; WFSBP [Bandelow 2012]) IM: Initial: 50 to 100 mg, then every 4 to 6 hours as needed.Hydroxyzine is a N-alkylpiperazine that is piperzine in which the nitrogens atoms are substituted by 2- (2-hydroxyethoxy)ethyl and (4-chlorophenyl) (phenyl)methyl groups respectively. It has a role as a H1-receptor antagonist, an anxiolytic drug, a dermatologic drug, an antipruritic drug and an anticoronaviral agent.Hydroxyzine. Trade Names: generic, Atarax, Vistaril ®. Drug Class: H1 Antagonist (piperazine subtype) Mechanism of Action: H1 competitive receptor antagonist (1st generation) Bronchodilator activity, and analgesic effects have been demonstrated experimentally and confirmed clinically. An antiemetic effect, both by the apomorphine test and the ...If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Storage . Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.The running joke of wearable technology is how pitifully unwearable it is. Even Diane von Furstenberg’s Midas touch couldn’t make Google Glass look cool. The running joke of wearab...How Long Should You Take Hydroxyzine for Sleep? In the treatment of sleep and anxiety issues, hydroxyzine should be used for a maximum duration of 3–4 months. Clinical studies confirmed the positive results of the drug over three months in adult patients. Still, there’s limited information on the effects of using hydroxyzine in the long ...The effectiveness of hydroxyzine as an antianxiety agent for long term use, that is more than 4 months, has not been assessed by systematic clinical studies. ... Do not use epinephrine as hydroxyzine counteracts its pressor action. Hydroxyzine overdose may cause QT prolongation and Torsade de Pointes. ECG monitoring is recommended …Hydroxyzine will stay in your system for about 100 hours, on average, but its clinical effect may wear off before this time. Hydroxyzine has a half-life of about 20 hours. The half-life of a drug is the time it takes for the plasma (blood) concentration to be reduced by 50% from its original value.I have only been taking Hydroxyzine 25 mg. tablets for one and a half days—3 times a day, but have had diarrhea and feel sleepy. It was prescribed for my itchy skin, a symptom I developed on a recent cruise. How long does it take for hydroxyzine to wear off, Pharmacological and clinical studies indicate that hydroxyzine in therapeutic dosage does not increase gastric secretion or acidity and in most cases has mild antisecretory activity. Hydroxyzine is rapidly absorbed from the gastrointestinal tract and hydroxyzine's clinical effects are usually noted within 15 to 30 minutes after oral administration., What you wear to Disney World and other amusement parks will have a big impact on your enjoyment. Here are the do's and don't's. Hitting the best theme parks in Orlando and elsewhe..., Hydroxyzine overdose. Hydroxyzine is an antihistamine available only with a prescription. It is used to treat symptoms of allergies and motion sickness. Hydroxyzine overdose occurs when someone takes more than the normal or recommended amount of this medicine. This can be by accident or on purpose., NatS; Taken for 2 to 5 years; June 10, 2020; Vistaril (hydroxyzine) for Anxiety "I’ve been taking Vistaril for anxiety on and off for years. More consistently for the past two years, it truly does help with anxiety, and is far safer than Benzo’s., Nausea & Vomiting (Off-label) 25-100 mg IM. Dosing Modifications Renal Impairment >50 mL/min: Dose adjustment not necessary; ≤50 mL/min: Administer 50% normal dose; ... buprenorphine, long-acting injection and hydroxyzine both increase QTc interval. Modify Therapy/Monitor Closely. If coadministration necessary, consider consider dose ..., Aug 29, 2023 · Pediatric hydroxyzine dosages are usually smaller. Kids younger than 6 years old typically take 50 mg every day in divided doses. Older kids may take up to 100 mg daily in divided doses. How long does it take for hydroxyzine to start working? , Usual Adult Dose for Anxiety. Oral: 50 to 100 mg orally 4 times a day Parenteral: 50 to 100 mg IM immediately, then every 4 to 6 hours as needed, Drowsiness, dizziness, blurred vision, dry mouth, constipation, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To relieve dry mouth ..., Are you wondering what to wear with large prints? Find out what to wear with large prints in this article. Advertisement One trend that never seems to go out of style is the print...., Nausea & Vomiting (Off-label) 25-100 mg IM. Dosing Modifications Renal Impairment >50 mL/min: Dose adjustment not necessary; ≤50 mL/min: Administer 50% normal dose; ... buprenorphine, long-acting injection and hydroxyzine both increase QTc interval. Modify Therapy/Monitor Closely. If coadministration necessary, consider consider dose ..., Upon admission to the unit, hydroxyzine 25 mg 3 times daily was started with no other changes in medication or therapy. The patient received prompt relief, and there were no further panic attacks during his 3-day admission or his 1-month follow-up. To the best of our knowledge, there are no published cases of successful treatment of acute ..., Hydroxyzine is an anti-histamine medication which has been used in the treatment of anxiety. Objectives: 1. To determine the efficacy of hydroxyzine in comparison with placebo or any other active agent in alleviating the acute symptoms of GAD. 2. To review acceptability of treatment with hydroxyzine in comparison with placebo or any …, Hydroxyzine is not known to interfere with the action of digitalis in any way and it may be used concurrently with this agent. The effectiveness of hydroxyzine as an antianxiety agent for long term use, that is more than 4 months, has not been assessed by systematic clinical studies., However, as the effects of the medication will wear off after several hours, patients may be prescribed the drug to take on a regular basis, to help keep their symptoms under control. In patients experiencing panic attacks relating to an anxiety disorder or insomnia from anxiety, 50 mg to 100 mg may be administered once, rather than on a ..., Hydroxyzine, belonging to antihistamine drugs, has been used to treat itchiness, anxiety, and nausea for more than six decades (Bayart, 1956). It is a well-known histamine H1 receptor antagonist (Richelson, 1979), and safe enough to take the dosage of 100 mg (Smith et al., 2016)., May 28, 2020 · However, hydroxyzine and other antihistamines may result in a false positive for other substances during a routine drug screening. The effects of histamine reduction can last for over 24 hours in some people but for many people about 12 hours while the other effects of hydroxyzine last closer to 3-6 hours. , Jan 16, 2017 · Hydroxyzine was approved for use in the United States in 1957 and continues to be widely used. It is available as tablets or capsules of 10, 25, 50 and 100 mg in multiple generic forms and under the trade names Atarax and Vistaril. Hydroxyzine is also available as an oral suspension or syrup and as a liquid for injection. , Hydroxyzine can be helpful for insomnia related to anxiety in the short-term, but is not meant for long-term use. Serotonin medicines are usually the initial long-term treatments used for anxiety. If you are experiencing anxiety or trouble sleeping, speak with your doctor about available treatments. Do not adjust medicines or doses on your own., Hydroxyzine is an antihistamine. It works by preventing the effects of a substance called histamine, which is produced by the body. This medicine is also used to control anxiety withdrawal symptoms in alcoholic patients. It is also used to control nausea and vomiting symptoms, and relieve anxiety in patients with certain heart disease., Hydroxyzine: learn about side effects, dosage, special precautions, and more on MedlinePlus Hydroxyzine is used in adults and children to relieve itching caused by allergic skin re..., How Long Hydroxyzine Lasts. Compared to other medications, it has a long half-life of 20 hours. This means that after 20 hours, most people will have metabolized the medication to be half of its original concentration from when they took it. The biggest concern with a long half-life like this is some of the medication’s effects may stick around., Descriptions. Hydroxyzine is used to help control anxiety and tension caused by nervous and emotional conditions. It can also be used to help control anxiety and produce sleep before surgery. This medicine is also used to relieve symptoms of allergic conditions (eg, chronic urticaria and atopic and contact dermatoses)., The effectiveness of hydrOXYzine as an antianxiety agent for long term use, that is more than 4 months, has not been assessed by systematic clinical studies. ... Do not use epinephrine as hydrOXYzine counteracts its pressor action. HydrOXYzine overdose may cause QT prolongation and Torsade de Pointes. ECG monitoring is recommended …, hydroxyzine: [noun] a compound C21H27ClN2O2 used as an antihistamine and tranquilizer., You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Hydroxyzine is used to treat itching caused by allergies. It is an antihistamine and works by blocking a certain natural substance (histamine) that yo., May 1, 2024 · Descriptions. Hydroxyzine is used to help control anxiety and tension caused by nervous and emotional conditions. It can also be used to help control anxiety and produce sleep before surgery. This medicine is also used to relieve symptoms of allergic conditions (eg, chronic urticaria and atopic and contact dermatoses). , Hydroxyzine HCl is used to treat temporary anxiety, worry, and periods of emotional stress. Hydroxyzine can also relieve itching due to hives, allergic reactions, or atopic dermatitis. Hydroxyzine injections are used to relieve nausea and vomiting. Finally, doctors also use hydroxyzine HCl as a sedative before medical procedures or following ..., Apr 26, 2023 · Take hydroxyzine exactly as your doctor tells you to. Usually, it is sufficient to take one dose at night to control symptoms. Where this is not the case, you may be asked to take 2 or 3 doses during the day in addition to your dose at night. You can take hydroxyzine before or after food. , Take your medication at regular intervals. Do not take your medication more often than directed. Talk to your care team regarding the use of this medication in children. Special care may be needed. While this medication may be prescribed for children as young as 2 years of age for selected conditions, precautions do apply., How long do hydroxyzine oral tablets take to work? You should notice hydroxyzine working to relieve your symptoms within 1 hour of taking the tablets. Some …, How Long Do Symptoms Of Overdose Last? The reported half-life (the time it takes to metabolize and eliminate 50% of a drug from the body) of hydroxyzine is between 14 to 25 hours. However, the medication has a duration of action of only 4 to 8 hours for most individuals and is therefore dosed 3 to 4 times daily., Dosage for Vistaril. For symptomatic relief of anxiety and tension associated with psychoneurosis and as an adjunct in organic disease states in which anxiety is manifested: in adults, 50 to 100 mg 4 times daily; children under 6 years, 50 mg daily in divided doses; and over 6 years, 50 to 100 mg daily in divided doses., Hydroxyzine overdose. Hydroxyzine is an antihistamine available only with a prescription. It is used to treat symptoms of allergies and motion sickness. Hydroxyzine overdose occurs when someone takes more than the normal or recommended amount of this medicine. This can be by accident or on purpose.