MEDOMYCIN CAPSULE 100mg

Contents

Doxycycline

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

5-hydroxy-α-6-deoxytetracycline | 6-alpha-deoxy-5-oxytetracycline | 6alpha-deoxy-5-oxytetracycline | 6α-deoxy-5-oxytetracycline | Anhydrous doxycycline | Doxiciclina | Doxycyclin | Doxycycline (anhydrous) | Doxycycline anhydrous | Doxycyclinum | Doxycycline |

Description

A synthetic tetracycline derivative with similar antimicrobial activity. Animal studies suggest that it may cause less tooth staining than other tetracyclines. It is used in some areas for the treatment of chloroquine-resistant falciparum malaria (malaria, falciparum).

Indication

Doxycycline is indicated for use in respiratory tract infections caused by Mycoplasma pneumoniae, Haemophilus influenzae, Streptococcus pneumoniae, Legionella spp., or Klebsiella spp. It is also used for prophylaxis of malaria. Doxycycline is indicated for a variety of bacterial infections, from Mycobacterium fortuitum and M. marinum, to susceptible E. coli and Brucella spp. It can be used as an alternative to treating plague, tetanus, Campylobacter fetus

Mechanism of Action

Doxycycline, like minocycline, is lipophilic and can pass through the lipid bilayer of bacteria. Doxycycline reversibly binds to the 30 S ribosomal subunits and possibly the 50S ribosomal subunit(s), blocking the binding of aminoacyl tRNA to the mRNA and inhibiting bacterial protein synthesis. Doxycycline prevents the normal function of the apicoplast of Plasmodium falciparum, a malaria causing organism.

Pharmacodynamics

Doxycycline, a long-acting tetracycline derived from oxytetracycline, is used to inhibit bacterial protein synthesis and treat non-gonococcal urethritis and cervicitis, exacerbations of bronchitis in patients with COPD, and adult periodontitis.

Pharmacokinetics

Absorption:

Completely absorbed following oral administration.

Distribution:

Not Available

Metabolism:

Hepatic

Elimination:

They are concentrated by the liver in the bile and excreted in the urine and feces at high concentrations in a biologically active form.

Half-life

18-22 hours

Clearance

Not Available

Toxicity

Symptoms of overdose include anorexia, nausea, diarrhoea, glossitis, dysphagia, enterocolitis and inflammatory lesions (with monilial overgrowth) in the anogenital region, skin reactions such as maculopapular and erythematous rashes, exfoliative dermatitis, photosensitivity, hypersensitivity reactions such as urticaria, angioneurotic oedema, anaphylaxis, anaphyl-actoid purpura, pericarditis, and exacerbation of systemic lupus erythematosus, benign intracranial hypertension in adults disappearing on discontinuation of the medicine, haematologic abnormalities such as haemolytic anaemia, thrombocytopenia, neutropenia, and eosinophilia. LD50=262 mg/kg (I.P. in rat).

References

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

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Approval Information

MEDOMYCIN CAPSULE 100mg was registered with Health Science Authority of Singapore by MEDOCHEMIE SINGAPORE PTE LTD. It is marketed with the registration number of SIN00968P with effective from 1988-10-05.

This product contains 100mg of Doxycycline in the form of CAPSULE.

The medicine was manufactured by MEDOCHEMIE LTD - Factory AZ in CYPRUS

It is a Presciption Only Medicine which can only be obtained from a doctor or a dentist, or from a pharmacist with a prescription from a Singapore-registered doctor or dentist.

Anatomical Therapeutic Chemical (ATC) Classification

ATC Code: J01AA02

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