Medicines & Supplements A to Z > Merislon


Last updated on 19/10/2021.

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

GENERIC NAME: Betahistine


DRUG CLASS: Antivertigo agents

SUB CLASS: Histamine analogues

USED FOR: Vertigo, Tinnitus

– 6mg (tablets)

What is Merislon for?

Merislon is a brand product that contains Betahistine, which is a type of histamine analogue. It has a range of actions on multiple histamine receptors. Merislon is used to treat vertigo and tinnitus.

How to use it?

Merislon is available as tablets. Taking Merislon with food can reduce stomach discomfort. The usual daily dose is 6-12mg three times a day.

What are the side effects of Merislon?

Common side effects of Merislon include headache, nausea and stomach discomfort.

Who should not take Merislon?

– People who are allergic to betahistine or any component of the formulation
– Patients with presence or history of active peptic ulcer disease
– Patients with pheochromocytoma

Pharmacist Tips:

– There are many lifestyle changes you can do to reduce vertigo, such as slowing down your movement and avoiding loud voices.
– If your symptoms do not improve after taking this medicine, speak to your healthcare professional to get advice.

Common dosing schedule:
Merislon is taken three times daily, and usually with food to reduce stomach discomfort.

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

Some common medications Merislon may interact with:
– Antihistamines, e.g. Cetirizine, Fexofenadine
– B2 agonists, e.g. Terbutaline, Albuterol
– Monoamine oxidase inhibitors, e.g. Selegiline, Rasagiline

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

Where to buy Merislon in Hong Kong?

In Hong Kong, Merislon is an over-the-counter medicine and 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 Merislon 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.