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Brand name: Doryx TM

Active ingredients: doxycycline

What it is used for

INDICATIONS AS AT 24 March 2004: Doxycycline is primarily bacteriostatic and is thought to exert its antimicrobial effect by the inhibition of protein synthesis. Doxycycline is active against a wide range of gram positive and gram negative organisms. NOTE: THE 50 mg CAPSULE IS NOT A PAEDIATRIC FORMULATION. Doryx is indicated in the treatment of infections caused by the following micro-organisms: Mycoplasma pneumoniae: primary atypical pneumonia. Rickettsiae: Queensland tick typhus, typhus fever and Q fever Agents of psittacosis. Calymmatobacterium (Donovania) granulomitis: granuloma inguinale. Agents of lymphogranuloma venereum. Borreliae: relapsing fever. Chlamydia trachomatis. Doryx is indicated in the treatment of trachoma, although the infectious agent is not always eliminated, as judged by immunofluorescence. Inclusion conjunctivitis may be treated with oral Doryx alone, or in combination with topical agents. Doryx is indicated in the treatment of infections caused by the following gram negative micro-organisms: Vibrio species: cholera. Brucella species: brucellosis (in conjunction with streptomycin). Yersinia pestis: plague. Francisella tularensis: tularemia. Bartonella bacilliformis: Bartonellosis. Bacteroides species. When penicillin is contraindicated, doxycycline is an alternative drug in the treatment of infections due to: Treponema pallidum: syphilis. Treponema pertenue: yaws. Neisseria gonorrhoea: gonorrhoea (see Dosage and Administration). Doryx is not the drug of choice in the treatment of any type of Staphylococcal infection or infections caused by Streptococcus pneumoniae, Haemophilus influenzae, Streptococcus pyogenes, Streptococcus faecalis, or any type of enteric bacteria because many strains of these organisms have been shown to be resistant to doxycycline. Doxycycline should not be used in these infections unless the organism has been shown to be sensitive. For upper respiratory tract infections due to group A beta-haemolytic streptococci (including prophylaxis of rheumatic fever) penicillin is the usual drug of choice. Doxycycline is active against both pre-erythroycitic and asexual bloodstages of Plasmodium falciparum. The tetracyclines are only partially active against the pre-erythrocytic stages of Plasmodium vivax and protection depends on drug suppression of the blood stages. Doxycycline has no activity against the relapsing forms (hypnozoites) of Plasmodium vivax. Doxycycline is indicated, in adults and children older than 10 years, as chemoprophylaxis for malaria caused by Plasmodium falciparum and, in combination with other antimalarial agents, against malaria caused by Plasmodium vivax. Doxycycline is only able to suppress malaria caused by P. vivax. As there are relatively few locations where P. vivax does not co-exist to some extent with P. falciparum, it is recommended that doxycycline should be used routinely with other agents, for example chloroquine. In acute intestinal amoebiasis Doryx may be a useful adjunct to amoebicides. In severe acne Doryx may be a useful adjunctive therapy.

How to take it

You should seek medical advice in relation to medicines and use only as directed by a healthcare professional.

  • The way to take this medicine: Oral
  • Store below 25 degrees Celsius
  • Shelf lifetime is 24 Months.

Always read the label. If symptoms persist see your healthcare professional.

Visual appearance

Hard gelatin capsules, size 2, printed Doryx 100 in black and filled with yellow spheroidal pellets.

Images are the copyright of the Pharmacy Guild of Australia

Do I need a prescription?

This medicine is available from a pharmacist and requires a prescription. It is Schedule 4 : Prescription Only Medicine.

Is this medicine subsidised?

This medicine was verified as being available on the PBS (Pharmaceutical Benefits Scheme) on November 1, 2018. To learn more about this subsidy, visit the Pharmaceutical Benefits Scheme (PBS) website.

Pregnant or planning a pregnancy?

For the active ingredient doxycycline

You should seek advice from your doctor or pharmacist about taking this medicine. They can help you balance the risks and the benefits of this medicine during pregnancy.

Download leaflet

For side effects, taking other medicines and more

Download consumer medicine information leaflet (pdf) from the Therapeutic Goods Administration (TGA) website

Reporting side effects

You can help ensure medicines are safe by reporting the side effects you experience.

You can report side effects to your doctor, or directly at www.tga.gov.au/reporting-problems

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