Tetracyclines

From WikiMD's Food, Medicine & Wellness Encyclopedia

Tetracyclines is a group of antibiotic drugs used to treat a wide variety of infections, including bronchitis and some types of pneumonia


Information about Tetracyclines[edit source]

The tetracyclines are broad-spectrum, bacteriostatic antibiotics that are active against many pathogens including gram positive and gram negative bacteria, spirochetes, chlamydia, leptospira, mycoplasma and rickettsia. They are widely used in medical practice, but currently have restricted usefulness. Tetracyclines act by binding to bacterial ribosomes inhibiting protein synthesis. Bacterial resistance is common and is usually caused by plasmids that decrease the bacterial cell wall permeability.

FDA approval information for Tetracyclines[edit source]

At least five different tetracyclines are currently available in the United States: tetracycline, doxycycline, minocycline, tigecycline and demeclocycline. Several others tetracyclines have been used in the past in the United States or Europe, but have been withdrawn (chlortetracycline, aureomycin, triacetyloleandomycin, rolitetracycline, oxytetracycline). While all tetracyclines are capable of causing a distinctive form of acute fatty liver disease when given intravenously in high doses, liver injury from oral forms tetracyclines vary greatly in frequency and clinical features.

FDA approval information for Tetracyclines[edit source]

Minocycline is the most commonly implicated tetracycline in causing liver injury and generally ranks within the 10 most common causes of drug induced liver injury in developed nations. Minocycline hepatotoxicity generally presents with a long latency, hepatocellular enzyme elevations, prominent autoimmune features, apparent response to corticosteroid therapy and relatively bengn course. Doxycycline, in contrast, usually presents with a short latency (within 60 days), a cholestatic course, minimal immunoallergic or autoimmune features and sometimes prolonged, but ultimately benign course. List of tetracyclines

Tetracyclines Resources
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Contributors: Prab R. Tumpati, MD