Cetirizine hydrochloride is a commonly used second-generation antihistamine medicine. It is mainly used to relieve allergy symptoms such as sneezing, runny nose, itchy nose or throat, and red or watery eyes. It is also commonly used to reduce itching associated with urticaria, commonly known as hives.
Cetirizine works by blocking the effects of histamine, a chemical released by the body during an allergic reaction. By reducing the action of histamine, cetirizine can help control symptoms such as itching, sneezing, watery eyes, and a runny nose.
Cetirizine is generally considered less sedating than many older antihistamines. However, some people can still experience drowsiness or tiredness after taking it.
What Is Cetirizine Hydrochloride?
Cetirizine hydrochloride is the hydrochloride form of cetirizine and belongs to the antihistamine group of medicines.
It is commonly available as a 10 mg tablet, although other strengths and liquid formulations may also be available depending on the manufacturer and country.
Cetirizine is primarily used for allergic conditions rather than infections. It can reduce allergy-related symptoms, but it does not remove the underlying cause of every condition that produces itching or a runny nose.
Brand Names of Cetirizine
Cetirizine may be available under different brand names depending on the manufacturer and country. Some products are sold under the generic name cetirizine, while pharmaceutical companies market the medicine under their own brand names.
Examples of cetirizine brands include:
- Hicet 10 mg
- Cetirizine tablets
- Zyrtec
- Okacet
- Alerid
The availability of a particular brand can vary between countries and pharmacies. Some products may also contain cetirizine in combination with another active ingredient.
Therefore, when purchasing this medicine, check the active ingredient, strength, and expiry date on the package rather than relying only on the brand name.
Uses of Cetirizine
Cetirizine is mainly used to control symptoms caused by allergies. Some common uses are explained below.
1. Allergic Rhinitis
Cetirizine can help relieve symptoms of allergic rhinitis, including:
- Sneezing
- Runny nose
- Itchy nose
- Itchy throat
- Watery or itchy eyes
It may be useful for seasonal allergies as well as other forms of allergic rhinitis.
2. Urticaria or Hives
Urticaria, commonly called hives, causes raised and itchy areas on the skin. It can occur because of an allergic reaction or other triggers.
Cetirizine can help reduce the itching associated with urticaria.
However, if hives occur together with difficulty breathing, swelling of the tongue or throat, difficulty swallowing, severe dizziness, or fainting, immediate medical attention is required. Such symptoms can indicate a serious allergic reaction.
3. Allergy-Related Eye Symptoms
Some people experience itchy, red, or watery eyes because of allergies. Cetirizine can help relieve these allergy-related symptoms.
4. Insect Bites
Some insect bites can cause itching, redness, and localized swelling. An antihistamine such as cetirizine may help reduce allergy-related itching.
However, a severe reaction after an insect bite or sting requires urgent medical evaluation, particularly when there is difficulty breathing or significant swelling of the face, mouth, or throat.
Does Cetirizine Treat Asthma?
Cetirizine is not a primary treatment for asthma.
Asthma affects the airways and normally requires appropriate medicines prescribed according to the patient's condition. Cetirizine may sometimes be used when a person also has an allergy, but it should not replace prescribed asthma medicines.
Therefore, people with asthma should continue their prescribed treatment and consult their doctor before changing or stopping any medicine.
Can Cetirizine Treat Scabies?
Cetirizine may help reduce itching, but it does not kill the mites responsible for scabies.
Scabies requires appropriate anti-scabies treatment. Taking an antihistamine alone will not eliminate the infestation.
This distinction is important because itching can occur in many different skin conditions. Treating only the itching may not treat the underlying problem.
For example, fungal infections require antifungal medicines rather than simply treating the itching. You can learn more about one commonly used topical antifungal medicine in our article Luliconazole Cream: Uses and Other Information.
Who Should Be Careful With Cetirizine?
Cetirizine is suitable for many people, but certain individuals should consult a healthcare professional before using it.
Tell your doctor or pharmacist if you:
- Have kidney disease
- Have serious liver problems
- Have difficulty passing urine
- Have epilepsy or a history of seizures
- Have previously experienced an allergic reaction to cetirizine
- Are pregnant or planning to become pregnant
- Are breastfeeding
- Take other medicines that can cause drowsiness
People with reduced kidney function may require a different dose.
Pregnancy or breastfeeding does not automatically mean cetirizine can never be used, but medical advice is recommended before taking any medicine during these periods.
Alcohol can increase the chance of drowsiness, so it is better to avoid or limit alcohol while taking cetirizine.
Cetirizine Side Effects
Like all medicines, cetirizine can cause side effects, although many people do not experience serious problems.
Common or possible side effects include:
- Drowsiness
- Tiredness
- Headache
- Dry mouth
- Dizziness
- Nausea or stomach discomfort
- Diarrhea in some people
Drowsiness is particularly important because it can affect activities that require concentration.
If cetirizine makes you sleepy, avoid driving, operating machinery, or performing other activities that require full alertness.
A serious allergic reaction to cetirizine is uncommon. However, seek urgent medical attention if you develop severe breathing difficulty, swelling of the lips, mouth, tongue, or throat, or difficulty swallowing.
Cetirizine Dosage
The appropriate dose depends on the person's age, kidney function, medical condition, and the reason for treatment.
For many adults and children aged 12 years or older, the usual dose is 10 mg once daily. Some people may require a lower dose, particularly when kidney function is reduced.
Children should receive an age-appropriate dose and formulation. Do not give a child an adult-strength tablet simply because allergy symptoms are present.
It is also important not to increase the dose without professional advice.
In some medical situations, doctors may recommend a higher dose, but this should only be done under appropriate medical supervision.
The duration of treatment also varies. Some people may need cetirizine for only a few days, while others may use it during an allergy season or for longer periods according to professional advice.
What Happens If You Miss a Dose?
If you forget to take a dose, follow the instructions provided with your medicine. Generally, do not take an extra dose simply to make up for a missed dose.
Taking more medicine than recommended can increase the risk of side effects, particularly drowsiness.
If you accidentally take more than the recommended amount, contact a doctor or pharmacist for advice.
Important Precautions
Do not assume that every itchy rash is an allergy.
Itching can be caused by allergies, fungal infections, scabies, eczema, insect bites, and many other conditions. Treating only the itching may sometimes hide symptoms without treating the underlying problem.
It is particularly important to avoid using prescription medicines without appropriate advice.
For example, inappropriate use of topical steroids can cause skin problems. Our article Steroid Effect and Use in Nepal discusses concerns related to inappropriate steroid use on the skin.
Frequently Asked Questions About Cetirizine
Is cetirizine a sleeping tablet?
No. Cetirizine is an antihistamine used mainly for allergy symptoms. However, it can cause drowsiness in some people.
Can cetirizine be taken every day?
Cetirizine can be taken regularly when appropriate and according to the product instructions or a healthcare professional's advice. The required duration depends on the condition being treated.
Can cetirizine cure the common cold?
Cetirizine does not cure the common cold. It is primarily an allergy medicine. It may help certain symptoms when they are caused by allergies.
Can I take two 10 mg cetirizine tablets?
Do not take two tablets unless a doctor has specifically advised you to do so. Taking more than the recommended amount can increase the risk of side effects.
Does cetirizine cure scabies?
No. Cetirizine can help reduce itching but does not kill scabies mites. Specific treatment is required to eliminate scabies.
Does cetirizine treat fungal infections?
No. Cetirizine is an antihistamine and does not kill fungi. Fungal skin infections require appropriate antifungal treatment. You can read more about Luliconazole Cream on our website.
Final Thoughts
Cetirizine hydrochloride is a widely used second-generation antihistamine that can provide relief from common allergy symptoms and itching associated with conditions such as urticaria.
It is commonly available in a 10 mg strength, although the appropriate dose varies according to age, kidney function, and individual circumstances.
Although cetirizine is generally well tolerated, it can cause drowsiness, tiredness, dry mouth, and other side effects in some people. People with kidney problems, difficulty urinating, seizure disorders, or other medical conditions should seek professional advice before using it.
Most importantly, cetirizine should not be considered a treatment for every condition that causes itching. It does not cure scabies, fungal infections, or asthma. Correctly identifying the underlying condition is important for choosing the right treatment.
For more information about medicines and their responsible use, readers can also explore the Medicine section of Aanand Singh – Health and Medicine Blog.
References
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MedlinePlus – Cetirizine Drug Informationhttps://medlineplus.gov/druginfo/meds/a623043.html
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NHS – Cetirizinehttps://www.nhs.uk/medicines/cetirizine/
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NHS – How and When to Take Cetirizinehttps://www.nhs.uk/medicines/cetirizine/how-and-when-to-take-cetirizine/
