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Merislon is a medication primarily used to treat vertigo and balance disorders.

Last Modified: 03 Jul 2024

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What is Merislon? 

Merislon is a medication primarily used to treat vertigo and balance disorders. Its active ingredient is betahistine, which is known to improve blood flow in the inner ear, potentially normalizing the pressure of the ear fluids. 

Merislon works by blocking the action of histamine at its receptors (H3 receptors in particular), leading to dilation of the vessels in the inner ear and improving microcirculation. The chemical structure of betahistine encourages this vasodilatory effect without typical anti-histaminergic side effects such as drowsiness, blurred vision and dry mouth. 


Global Name

The generic name of Merislon is betahistine. Betahistine is also marketed under various brand names, including Serc, Betaserc, and Veserc. 


What is Merislon used for? 

Merislon is prescribed for: 

  • Management of vertigo, tinnitus, and hearing loss associated with Ménière's disease. 
  • Other balance disorders where vestibular compensation is needed. 

How do you use Yaz?  


Merislon is available in tablet form. 

Dosage information:

  • Adults: The typical starting dose is 8-16 mg taken three times a day, adjusted according to patient response. 
  • Elderlies: Same as adult dosage, but caution is advised due to potential age-related renal and hepatic function decline and multiple medication interaction. 
  • Children: Use in children is not recommended due to limited safety data. 

Are the following suitable to take the drug: Children, adults, elderlies? 

  • Children: Not recommended. 
  • Adults: Yes. 
  • Elderlies: Yes, with caution. 

Is there anyone who can’t take Merislon? 

  • Children: Not recommended due to insufficient safety data. 
  • Adults: Those with peptic ulcer disease or severe asthma should avoid it. 
  • Elderlies: Caution advised, monitor closely. 
  • Pregnancy: Consult a healthcare provider; use only if clearly needed. 
  • Lactation: Not recommended as there are no data on excretion in human milk. 

Allergies: Individuals allergic to betahistine or any other components of Merislon should avoid this medication. 

Warnings and Precautions:

  • Patients with pheochromocytoma should not take Merislon due to potential risk of increased blood pressure. 
  • Merislon should be taken with meals to minimize gastrointestinal discomfort.

Drug and Food/Beverage Interactions

Merislon may interact with other antihistamines or monoamine oxidase inhibitors (MAOIs). It should not be used concurrently with these medications without medical supervision.

Side Effects

Common side effects include nausea, indigestion, and mild gastrointestinal disturbances. Rarely, it may cause severe allergic reactions. 


Pharmacist Tips

Storage information:

Store at room temperature away from moisture and heat. 

Handling instructions:

Handle tablets with clean hands and ensure the bottle is tightly closed after use to maintain tablet integrity. 



Where is Merislon available in Hong Kong?

Merislon is a prescription medication that can be prescribed by healthcare providers. 



How long does it take for Merislon to work? 

Improvement in symptoms may be noticed within a few weeks, but it can take longer for full benefits to be realized. 

Can Merislon be used long-term? 

Yes, it is often used long-term under medical supervision, especially for chronic conditions like Ménière's disease. 

Is there any special diet to follow while taking Merislon? 

No specific diet is required, but it may be taken with food to reduce gastrointestinal side effects. 

Can I drive while taking Merislon? 

Merislon does not usually affect the ability to drive, but individual responses can vary, especially if vertigo symptoms persist. 

This website provides content related to drug use and medicine for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Do not use the information on this website to diagnose or treat a health problem or disease without consulting a qualified healthcare provider. The website's owners and contributors are not liable for any repercussions, adverse effects, or consequences resulting from the use of any medication or information provided herein.

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