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It was first found near Pfizer laboratories in a soil sample yielding the soil actinomycete, Streptomyces rimosus by Finlay et al. In 1953, a celebrated Scottish American biochemist, Robert B Woodward, worked out the chemical structure of Oxytetracycline, enabling Pfizer to mass produce the drug under the trade name, Terramycin. This discovery by Woodward was a major advancement in Tetracycline research and paved the way for the discovery of an Oxytetracycline derivative, Doxycycline, which is one of the most popularly used antibiotics today.
Oxytetracycline, like other Tetracyclines, is used to treat many infections common and rare (see Tetracycline antibiotics group). Its better absorption profile makes it preferable to tetracycline for moderately severe acne at a dosage of 250-500mg four times a day for usually 6-8 weeks at a time, but alternatives should be sought if no improvement occurs by 3 months.
It is sometimes used to treat Spirochaetal infection,Clostridial wound infection and Anthrax in patients sensitive to Penicillin. Oxytetracycline is used to treat infections of the respiratory and urinary tracts, skin, ear, eye and Gonorrhoea although the use of Tetracyclines for such purposes has declined in recent years due to large increases in bacterial resistance to this class of drugs. The drug is particularly useful when Penicillins and/or Macrolides cannot be used due to allergy. It may be used to treat Legionnaire's Disease as a substitute for a Macrolide or Quinolone.
Oxytetracycline is especially valuable in treating Non-Specific-Urethritis, LGV, Lyme disease, Brucellosis, Cholera, Plague, Typhus, Relapsing Fever, Tulaeraemia and infections caused by Chlamydia, Mycoplasma and Rickettsia. Doxycycline is now preferred to Oxytetracycline for many of these indications because it has improved pharmacologic features.
The standard dose is 250-500mg six hourly by mouth. In particularly severe infections this dose may be increased accordingly. Occasionally, Oxytetracycline is given by intramuscular injection or topically in the form of creams, ophthalmic ointments or eye drops.
Side effects are mainly gastrointestinal and photosensitive allergic reactions common to the tetracycline antibiotics group.
Tablets containing 250mg Tablets of Oxytetracycline as the dihydrate.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Oxytetracycline". A list of authors is available in Wikipedia.|