Chlortetracycline

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Chlortetracycline
Chlortetracycline structure.svg
Chlortetracycline.png
Clinical data
Trade names Aureomycin
AHFS/Drugs.com Micromedex Detailed Consumer Information
Routes of
administration
By mouth, IV, topical
ATC code
Pharmacokinetic data
Bioavailability 30%
Protein binding 50 to 55%
Metabolism Gastrointestinal tract, hepatic (75%)
Metabolites Isochlortetracycline
Elimination half-life 5.6 to 9 hours
Excretion 60% renal and >10% biliary
Identifiers
  • (4S,4aS,5aS,6S,12aR)-7-Chloro-4-(dimethylamino)-1,6,10,11,12a-pentahydroxy-6-methyl-3,12-dioxo-4,4a,5,5a-tetrahydrotetracene-2-carboxamide [1]
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
E number E702 (antibiotics) OOjs UI icon edit-ltr-progressive.svg
CompTox Dashboard (EPA)
ECHA InfoCard 100.000.310 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C22H23ClN2O8
Molar mass 478.882 g·mol−1
3D model (JSmol)
Specific rotation [α]D25−275°·cm3·dm−1·g−1 (methane)
Melting point 168 to 169 °C (334 to 336 °F)
Solubility in water 0.5–0.6 mg/mL (20 °C)
  • CN(C)[C@@H]2C(\O)=C(\C(N)=O)C(=O)[C@@]3(O)C(/O)=C4/C(=O)c1c(O)ccc(Cl)c1[C@@](C)(O)[C@H]4C[C@@H]23
  • InChI=1S/C22H23ClN2O8/c1-21(32)7-6-8-15(25(2)3)17(28)13(20(24)31)19(30)22(8,33)18(29)11(7)16(27)12-10(26)5-4-9(23)14(12)21/h4-5,7-8,15,26,28-29,32-33H,6H2,1-3H3,(H2,24,31)/t7-,8-,15-,21-,22-/m0/s1 Yes check.svgY
  • Key:CYDMQBQPVICBEU-XRNKAMNCSA-N Yes check.svgY
 X mark.svgNYes check.svgY  (what is this?)    (verify)

Chlortetracycline (trade name Aureomycin, Lederle Laboratories) is a tetracycline antibiotic, the first tetracycline to be identified. It was discovered in 1945 at Lederle Laboratories under the supervision of scientist Yellapragada Subbarow, Benjamin Minge Duggar. They were helped by Louis T. Wright, [2] a surgeon who conducted this medications first human experiments. Duggar identified the antibiotic as the product of an actinomycete he cultured from a soil sample collected from Sanborn Field at the University of Missouri. [3] The organism was named Streptomyces aureofaciens and the isolated drug, Aureomycin, because of their golden color. [1]

Contents

It is on the World Health Organization's List of Essential Medicines. [4]

Medical uses

A combination cream with triamcinolone acetonide is available for the treatment of infected allergic dermatitis in humans. [5]

In veterinary medicine, chlortetracycline is commonly used to treat conjunctivitis in cats, [6] dogs and horses. It is also used to treat infected wounds in cattle, sheep and pigs, and respiratory tract infections in calves, pigs and chickens. [5]

Contraindications

Chlortetracycline for systemic use is contraindicated in animals with severe hepatic or renal impairment. Topical chlortetracycline must not be used on the udder of animals whose milk is intended for human consumption. [5]

Adverse effects

Like other tetracyclines, chlortetracyclin can inhibit bone and tooth mineralization in growing and unborn animals, and color their teeth yellow or brown. It can also impair liver and kidney function. Allergic reactions are rare. [5]

Interactions

Chlortetracycline may increase the anticoagulant activities of acenocoumarol. The risk or severity of adverse effects can be increased when chlortetracycline is combined with acitretin, adapalene, or alitretinoin. Aluminum phosphate and aluminum hydroxide can cause decreases in the absorption of chlortetracycline resulting in a reduced serum concentration and potentially a decrease in efficacy. The therapeutic efficacy of mecillinam (amdinocillin), amoxicillin, and ampicillin can be decreased when used in combination with chlortetracycline. Chlortetracycline may increase the neuromuscular blocking activities of atracurium besilate. [7]

Pharmacology

Mechanism of action

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References

  1. 1 2 "chlortetracycline | C22H23ClN2O8 - PubChem". Pubchem.ncbi.nlm.nih.gov. Retrieved 2017-03-13.
  2. Posner, Gerald. PHARMA : Greed, Lies, and the Poisoning of America. S.L., Avid Reader Pr, 2021, pp. 47–57.
  3. Jukes TH (1985). "Some historical notes on chlortetracycline". Reviews of Infectious Diseases. 7 (5): 702–7. doi:10.1093/clinids/7.5.702. PMID   3903946.
  4. World Health Organization (2021). World Health Organization model list of essential medicines: 22nd list (2021). Geneva: World Health Organization. hdl: 10665/345533 . WHO/MHP/HPS/EML/2021.02.
  5. 1 2 3 4 Austria-Codex (in German). Vienna: Österreichischer Apothekerverlag. 2018.
  6. Merck Veterinary Manual . Retrieved 2017-03-13.{{cite book}}: |website= ignored (help)
  7. "Chlortetracycline - DrugBank". Drugbank.ca. Retrieved 2017-03-13.