Ingredient

Levocetirizine Hydrochloride

Levocetirizine hydrochloride is an antihistamine ingredient that alleviates allergy symptoms.

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All medicines
148
Single ingredient
124
Combination
24
Prescription medication
148

MFDS ingredient code M244596

What does it do?

Levocetirizine hydrochloride is an ingredient in the antihistamine class that blocks histamine receptors. It is mainly used to relieve allergy symptoms such as allergic rhinitis or urticaria. This ingredient inhibits the action of histamine, which causes allergic reactions.

Levocetirizine hydrochloride prevents histamine from binding to receptors in the body, preventing histamine from triggering allergic reactions. As a result, symptoms such as sneezing, runny nose, and itching are reduced. In other words, it effectively alleviates allergy symptoms.

Commonly used for

Approved uses differ by product. Check each product's information for its actual use.

Good to know

Levocetirizine hydrochloride is the active isomer of cetirizine, which is more selective and has fewer side effects. Unlike other first-generation antihistamines, it causes less drowsiness, resulting in less interference with daily life. This is a distinguishing feature that sets it apart from similar antihistamines.

Medicines containing this ingredient

Even with the same ingredient, strength, dosage form and how it is taken can differ.

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Dosage form
Strength
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148 total

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Even with the same ingredient, dosage and approved uses can differ by strength, dosage form and combined ingredients. Check each product's information before taking it.

Combined ingredients

Ingredients used together with this ingredient in combination products.

Questions about this ingredient

  • QCan this ingredient treat both rhinitis and hives?

    Levocetirizine hydrochloride is used to relieve allergic symptoms such as allergic rhinitis or urticaria by blocking histamine receptors. However, if you experience recurrent urticaria or difficulty breathing, it is advisable to seek medical attention to identify the cause.

    Answers 1 · 2026.09.14

  • QDoes Levocetirizine make you drowsy?

    The ingredient description states that levocetirizine hydrochloride tends to cause less drowsiness compared to certain existing antihistamines. However, individual reactions may vary, so when taking it for the first time, monitor your body's condition, and if you feel drowsy, avoid driving or hazardous tasks.

    Answers 1 · 2026.09.14

For anything that needs medical judgment, consult a doctor or pharmacist.

SourceKorea Ministry of Food and Drug Safety (Drug Safety Korea)

This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.