MEPHAQUIN LACTAB 250mg

Contents

Mefloquine

Source of information: Drugbank (External Link). Last updated on: 3rd July 18
*Trade Name used in the content below may not be the same as the HSA-registered product.

Active Ingredient / Synonyms

[(R*,S*)-2,8-bis(trifluoromethyl)quinolin-4-yl]-(2-piperidyl)methanol | alpha-2-Piperidinyl-2,8-bis(trifluoromethyl)-4-quinolinemethanol | Mefloquin | Mefloquina | Méfloquine | Mefloquine | Mefloquinum | Mefloquine |

Description

A phospholipid-interacting antimalarial drug (antimalarials). It is very effective against plasmodium falciparum with very few side effects. [PubChem]

Indication

For the treatment of mild to moderate acute malaria caused by Mefloquineuine-susceptible strains of Plasmodium falciparum (both chloroquine-susceptible and resistant strains) or by Plasmodium vivax. Also for the prophylaxis of Plasmodium falciparum and Plasmodium vivax malaria infections, including prophylaxis of chloroquine-resistant strains of Plasmodium falciparum.

Mechanism of Action

Mefloquine has been found to produce swelling of the Plasmodium falciparum food vacuoles. It may act by forming toxic complexes with free heme that damage membranes and interact with other plasmodial components.

Pharmacodynamics

Mefloquine is an antimalarial agent which acts as a blood schizonticide. Mefloquine is active against the erythrocytic stages of Plasmodium species. However, the drug has no effect against the exoerythrocytic (hepatic) stages of the parasite. Mefloquine is effective against malaria parasites resistant to chloroquine. Mefloquine is a chiral molecule. According to some research, the (+) enantiomer is more effective in treating malaria, and the (-) enantiomer specifically binds to adenosine receptors in the central nervous system, which may explain some of its psychotropic effects.

Pharmacokinetics

Absorption:

Well absorbed from the gastrointestinal tract. The presence of food significantly enhances the rate and extent of absorption.

Distribution:

* 20 L/kg [healthy adults]

Metabolism:

Hepatic. Two metabolites have been identified in humans. The main metabolite, 2,8-bis-trifluoromethyl-4-quinoline carboxylic acid, is inactive against Plasmodium falciparum. The second metabolite, an alcohol, is present in minute quantities.

Elimination:

There is evidence that mefloquine is excreted mainly in the bile and feces. Urinary excretion of unchanged mefloquine and its main metabolite under steady-state condition accounted for about 9% and 4% of the dose, respectively.

Half-life

2 to 4 weeks

Clearance

* 30 mL/min

Toxicity

Oral, rat: LD50 = 880 mg/kg. Symptoms of overdose include nausea, vomiting, and weight loss.

References

  1. Health Science Authority of Singapore - Reclassified POM
  2. Drugbank

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Approval Information

MEPHAQUIN LACTAB 250mg was registered with Health Science Authority of Singapore by APEX PHARMA MARKETING PTE LTD. It is marketed with the registration number of SIN00398P with effective from 1988-04-26.

This product contains 250mg of Mefloquine in the form of TABLET, FILM-COATED.

The medicine was manufactured by Acino Pharma AG in SWITZERLAND

It is a Pharmacy Only Medicine which can be obtained from a pharmacist at a retail pharmacy.

Anatomical Therapeutic Chemical (ATC) Classification

ATC Code: P01BC02

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