Meclozine


Concise Prescribing Info
Indications/Uses
Listed in Dosage.
Dosage/Direction for Use
Adult : PO Motion sickness 25-50 mg 1 hour before travel, repeat every 24 hours if necessary. Vertigo 25-100 mg daily in divided doses depending on clinical response.
Dosage Details
Oral
Vertigo
Adult: 25-100 mg daily in divided doses depending upon clinical response.
Child: ≥ 12 years Same as adult dose.

Oral
Motion sickness
Adult: 25-50 mg 1 hour before travel, repeat every 24 hours if necessary.
Child: 2-6 years 6.25 mg once daily; 6-12 years 12.5 mg once daily; >12 years Same as adult dose. All doses to be taken 1 hour before travel, repeat every 24 hours if necessary.
Special Patient Group
Pharmacogenomics

In an in-vitro metabolic study, CYP2D6 was noted to be the dominant enzyme for the metabolism of meclozine. FDA drug label states that large inter-individual variability in meclozine exposure may occur in patients with CYP2D6 phenotypes, thus resulting to poor, intermediate, extensive or ultra-rapid metabolism. Monitoring for adverse reactions and clinical effects is recommended in these patients.
Administration
May be taken with or without food.
Special Precautions
Patients with asthma, narrow-angle glaucoma, prostatic hyperplasia, bladder neck obstruction, urinary stricture, pyloric or duodenal obstruction. Patients with CYP2D6 polymorphism. Renal and hepatic impairment. Children and elderly. Pregnancy and lactation.
Adverse Reactions
Significant: Drowsiness.
Eye disorders: Rarely, blurred vision.
Gastrointestinal disorders: Dry mouth, vomiting.
General disorders and administration site conditions: Fatigue.
Immune system disorders: Anaphylactic reaction.
Nervous system disorders: Headache.
Patient Counseling Information
This drug may cause drowsiness, if affected, do not drive or operate machinery.
Drug Interactions
May increase CNS depression with tranquilizers and sedatives.
Food Interaction
May enhance CNS depressant effect with alcohol.
Action
Description: Meclozine blocks vasodepressor response to histamine and has a slight blocking action against acetylcholine. It decreases excitability of the middle ear labyrinth and blocks conduction in the middle ear vestibular-cerebellar pathways.
Synonym: Meclizine
Onset: Approx 1 hour.
Duration: Approx 24 hours.
Pharmacokinetics:
Absorption: Time to peak plasma concentration: Approx 3 hours.
Distribution: Volume of distribution: 7 L/kg.
Metabolism: Metabolised in the liver to norchlorcyclizine.
Excretion: Via urine and faeces as unchanged drug and metabolites. Elimination half-life: Approx 5-6 hours.
Chemical Structure

Click on icon to see table/diagram/image
Storage
Store between 20-25°C. Protect from light.
ATC Classification
R06AE05 - meclozine ; Belongs to the class of piperazine derivatives used as systemic antihistamines.
Disclaimer: This information is independently developed by MIMS based on Meclozine from various references and is provided for your reference only. Therapeutic uses, prescribing information and product availability may vary between countries. Please refer to MIMS Product Monographs for specific and locally approved prescribing information. Although great effort has been made to ensure content accuracy, MIMS shall not be held responsible or liable for any claims or damages arising from the use or misuse of the information contained herein, its contents or omissions, or otherwise. Copyright © 2020 MIMS. All rights reserved. Powered by MIMS.com
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