Hydroxyzine is a prescription antihistamine that may be used for several reasons, including relieving itching caused by allergic skin reactions, reducing anxiety and tension, or causing sedation before and after certain medical procedures. It works partly by blocking histamine and by reducing activity in the brain.
If you take this medication regularly, forgetting a dose can make you wonder whether you should take the missed dose as soon as you remember, wait until the next scheduled dose, or take extra medication. In most cases, the recommended approach is straightforward: take the missed dose when you remember unless it is almost time for the next dose. If the next dose is approaching, skip the missed dose and return to your regular schedule. Do not take two doses at once to make up for the missed dose.
The effects of missing a dose can vary depending on why you take this medicine, how often you take it, and your individual prescription.
What Is Hydroxyzine Used For?
Hydroxyzine belongs to a group of medicines called antihistamines. It is available in oral forms such as capsules, tablets, and liquid solution. Depending on the prescription, it may be taken several times a day or according to a specific schedule.
Doctors may prescribe it for:
- Itching caused by allergic skin reactions
- Anxiety and tension
- Sedation before or after general anesthesia
- Other uses determined by a healthcare professional
Because the drug can cause drowsiness, it is important to understand how it affects you before driving or operating machinery. Alcohol can also increase some of its side effects.
What Happens If You Miss a Dose of Hydroxyzine?
If you take this prescription regularly and miss a dose, you may notice that the condition the medicine was helping to control becomes more noticeable.
For example, someone taking the antihistamine for itching may experience more itching after missing a scheduled dose. Someone taking it for anxiety may notice that anxiety or tension becomes more noticeable. However, the effects of a missed dose can vary from person to person.
Missing one dose does not necessarily cause serious problems. The most important thing is to avoid taking extra medication to compensate for the missed dose.
According to MedlinePlus, if it is prescribed on a regular schedule, the missed dose should generally be taken when remembered. If it is almost time for the next dose, the missed dose should be skipped. A double dose should not be taken.
What Should You Do After Missing Hydroxyzine?
The appropriate response depends primarily on how close you are to your next scheduled dose.
If you remember relatively soon after the scheduled time, take the missed dose as directed by your prescription.
If it is almost time for your next dose, skip the missed dose and take your next dose at the normal time.
Do not take two doses together or take an extra dose unless your healthcare professional specifically instructs you to do so. Both MedlinePlus and Cleveland Clinic provide this general missed-dose guidance for this medication.
If you are unsure whether enough time has passed to take the missed dose, ask your pharmacist or healthcare provider.
What If You Miss Hydroxyzine for Anxiety?
Hydroxyzine may be prescribed to help relieve anxiety and tension. If you miss a scheduled dose, the symptoms it was helping to manage may become more noticeable.
You might notice increased feelings of anxiety or tension, although this is not necessarily what will happen after every missed dose.
Hydroxyzine is different from some medications that require careful tapering when discontinued. However, you should not change your prescribed schedule or stop taking a regularly prescribed medicine without discussing it with your healthcare professional.
If you repeatedly forget doses, speak with your prescriber or pharmacist about ways to make your medication schedule easier to follow.
What If You Miss Hydroxyzine for Itching?
This medication is also used to relieve itching associated with allergic skin reactions.
After missing a dose, itching or other allergy-related symptoms may return or become more noticeable. The exact effect depends on your condition and how hydroxyzine is being used.
If symptoms become severe or unusual, contact your healthcare provider rather than taking an additional dose without medical advice.
Should You Take Two Hydroxyzine Doses?
No. You should not take a double dose to compensate for a missed hydroxyzine dose.
Taking more hydroxyzine than prescribed can increase the risk of unwanted effects. Hydroxyzine can cause drowsiness, dizziness, dry mouth, and confusion. Serious effects can also occur with excessive amounts.
If you accidentally take more than prescribed, contact a poison control center, pharmacist, healthcare professional, or emergency medical service for guidance depending on the situation. In the United States, Poison Control can be reached at 1-800-222-1222. If someone has collapsed, has a seizure, has trouble breathing, or cannot be awakened, emergency medical attention is needed.
Can Missing Hydroxyzine Cause Withdrawal?
A single missed dose is not generally described as causing a typical withdrawal syndrome. However, symptoms that hydroxyzine was helping to control may return.
For example, someone taking it for itching may notice itching again, while someone taking it for anxiety may experience more anxiety or tension.
If you have been taking hydroxyzine regularly and are considering stopping it altogether, discuss your plans with your healthcare provider. Your prescriber can determine whether you should continue, adjust, or discontinue the medication based on why it was prescribed.
Does Missing a Dose Make Hydroxyzine Less Effective?
Missing an individual dose can temporarily reduce the medication’s intended effect because you have not taken the amount scheduled by your prescriber.
This does not necessarily mean that the treatment has permanently stopped working or that you need a higher dose.
Instead, follow the prescribed schedule going forward. If you regularly miss doses or feel that the medicine is no longer controlling your symptoms, talk with your healthcare provider rather than changing the dose yourself.
What Are Common Side Effects of Hydroxyzine?
Hydroxyzine can cause side effects even when it is taken as prescribed. Commonly reported effects include:
- Drowsiness
- Dry mouth
- Dizziness
- Headache
- Confusion, particularly in older adults
Because hydroxyzine can cause drowsiness, avoid driving or operating machinery until you know how the medicine affects you. Alcohol can make some side effects worse.
If you experience unusual or severe symptoms while taking the medication, contact your healthcare provider.
Can You Take Hydroxyzine With Other Medicines?
Hydroxyzine can interact with other medicines and substances. Cleveland Clinic notes potential interactions with alcohol, other antihistamines, certain medicines used for anxiety or sleep, some seizure medicines, and certain antibiotics, among others.
Tell your doctor and pharmacist about all prescription medicines, over-the-counter medicines, vitamins, and supplements you take. This is especially important if you are considering taking another medicine after missing a dose.
Do not use another medication to replace the missed dose unless your healthcare professional tells you to do so.
Who Should Be Especially Careful With Hydroxyzine?
Certain medical conditions can affect whether hydroxyzine is appropriate. Healthcare professionals may need to consider a person’s heart rhythm, heart disease, glaucoma, kidney or liver problems, breathing conditions, and other health factors before prescribing it.
Hydroxyzine can affect heart rhythm in some people. MedlinePlus advises that people with a prolonged QT interval or certain heart conditions discuss these issues with their healthcare provider.
Older adults may also be more susceptible to some effects of the medication. MedlinePlus notes that hydroxyzine is generally not preferred for older adults because other medicines may be safer.
When Should You Contact a Doctor?
Contact your healthcare provider or pharmacist if you are uncertain about what to do after missing a dose, particularly if you take it multiple times a day or take several other medications.
You should also discuss repeated missed doses if forgetting your medication is becoming common. A pharmacist or healthcare professional may be able to suggest ways to make your medication schedule easier to follow.
Seek urgent medical attention for serious symptoms such as seizures, significant breathing difficulty, loss of consciousness, or other severe reactions. An overdose can cause serious symptoms, including severe drowsiness, seizures, breathing problems, abnormal heart activity, and loss of consciousness.
How Can You Remember Your Hydroxyzine Dose?
If you frequently forget to take your doses, creating a consistent medication routine may help.
You can consider:
- Taking it at the same time each day when prescribed on a regular schedule
- Using a medication reminder on your phone
- Keeping a medication chart
- Using a pill organizer when appropriate
- Asking a family member to remind you
- Keeping your medication in a safe, consistent location
MedlinePlus recommends medication charts, consistent storage, and reminders as strategies that can help people take medicines as prescribed.
FAQs
Can I take hydroxyzine as soon as I remember a missed dose?
If you remember relatively soon and the next scheduled dose is not close, you can generally take the missed dose as directed. If the next dose is approaching, skip the missed dose instead.
How many hours can I wait before taking a missed hydroxyzine dose?
There is no single number of hours that applies to everyone. The timing depends on your prescribed schedule and when your next dose is due. Ask your pharmacist if you are unsure.
What if I miss two doses of hydroxyzine?
Do not take extra hydroxyzine to compensate for multiple missed doses. Resume your prescribed schedule and contact your healthcare provider or pharmacist if you are unsure how to proceed.
Can missing hydroxyzine make me feel anxious?
If you take hydroxyzine to help manage anxiety, missing a scheduled dose may allow anxiety or tension to become more noticeable. This does not necessarily happen after every missed dose.
Can missing hydroxyzine make itching worse?
If hydroxyzine is being used to control itching, missing a dose may allow itching or related symptoms to return or become more noticeable.
Can I take hydroxyzine earlier than scheduled after missing a dose?
Taking a dose earlier than prescribed may increase the amount of medication in your system. Follow the prescribed schedule unless your healthcare professional gives you different instructions.
Should I stop hydroxyzine if I keep forgetting doses?
Do not stop or change your treatment schedule on your own. If you frequently miss doses, talk with your doctor or pharmacist about your medication schedule and ways to remember it.
Can I drink alcohol after missing a hydroxyzine dose?
Missing a dose does not necessarily make alcohol safe to combine with hydroxyzine. Hydroxyzine can cause drowsiness, and alcohol may increase this effect. Ask your healthcare professional about alcohol use while taking hydroxyzine.
What should I do if I accidentally take an extra hydroxyzine dose?
Contact your doctor, pharmacist, or poison control center for advice. Seek emergency medical attention for serious symptoms such as difficulty breathing, seizures, severe drowsiness, or loss of consciousness.
Can a missed hydroxyzine dose affect sleep?
Hydroxyzine can cause drowsiness and is sometimes used as part of treatment plans where sedation is desired. If you normally take it at night, missing a dose could change how sleepy you feel, but the effect varies between individuals.
Conclusion
So, what happens if you miss a dose of hydroxyzine? In many cases, you may notice that the symptoms hydroxyzine was controlling, such as itching, anxiety, or tension, become more noticeable. The effect depends on why you take the medication and your individual treatment plan.
If you remember a missed dose, take it when you remember unless it is almost time for the next dose. If the next dose is close, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for the missed medication.
If you are unsure what to do, or if you accidentally take too much hydroxyzine, contact a pharmacist, doctor, or poison control service for advice. At Senior Life Pharmacy, we are committed to helping you manage your medications safely. Always follow the specific instructions provided with your prescription, because your dosing schedule may differ from someone else’s.
Medical disclaimer: This article is for general educational purposes and does not replace advice from a doctor or pharmacist. Do not change your hydroxyzine dose or treatment schedule without professional medical advice.
