Medicines & Supplements A to Z > Loratadine


Last updated on 19/03/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Loratadine 


BRAND NAME(S) IN HONG KONG: Clarinase 佳連利絲 (contains Loratadine and Pseudoephedrine), Clarityne 佳力天, Rinityn 頑敏清

DRUG CLASS: Antihistamine (second-generation) 

USED FOR: Prevention and treatment of allergies including hay fever and allergic skin rash 

OTHER DRUGS IN THE SAME CLASS: Azelastine, Cetirizine, Desloratadine, Fexofenadine, Levocetirizine, Ketotifen

– 0.5mg/ml, 5mg/5ml (syrup)
– 5mg, 10mg (tablets)
– 10mg (capsules)

What is Loratadine for?

Loratadine is a non-drowsy (second-generation) antihistamine medication like Cetirizine, which is used to treat and prevent allergies. Allergic conditions include hay fever (allergic rhinitis), hives (urticaria). Antihistamines can also be used to manage the symptoms of the common cold such as runny nose and sneezing. Loratadine relieves symptoms of itching, runny nose, watery eyes and sneezing.

How to use it?

Loratadine is taken by mouth usually once per day. It is available as a tablet and syrup (usually for children). 

The regular adult dosage is 10 mg once daily. Loratadine can be taken at any time, but some people prefer to use it in the evening if they anticipate being exposed to a potential allergen the next day.

What are the side effects of Loratadine?

Loratadine has very few side effects. In most people when taken at usual dosage it does not cause drowsiness. However, some people may experience a small degree of drowsiness. Avoid driving or operating machinery until you know how you respond to Loratadine.

Who should not take Loratadine?

People allergic to loratadine or any component of the formulation should avoid the drug.

Pharmacist Tips:

– Do not chew or break the sustained or extended release tablets. Swallow whole with water.
– Loratadine may lower mental alertness, although this side effect is rare. You should be careful with skilled tasks such as driving and cycling, and avoid alcohol.

Common dosing schedule:
You can take Loratadine either with or without food.

This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Loratadine may interact with:
– Alcohol
– Droperidol
– Other antihistamine, e.g. Chlorpheniramine, Diphenhydramine, Fexofenadine, Hydroxyzine, Levocetirizine, Promethazine

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Loratadine in Hong Kong?

In Hong Kong, Loratadine is an over-the-counter medicine which can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health. 

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Loratadine in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.