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Pharmacology: Pharmacodynamics: Colchicine acts against the inflammatory response to urate crystals, by possibly inhibiting the migration of granulocytes into the inflamed area. This reduces the release of lactic acid and proinflammatory enzymes that occur during phagocytosis and breaks the cycle that leads to the inflammatory response.
Pharmacokinetics: Peak plasma concentrations of colchicine are reached within 2 hours of oral administration. Colchicine is partially deacetylated in the liver and unchanged drug and its metabolites are excreted in the bile and undergo intestinal reabsorption. Colchicine is found in high concentration in leucocytes, kidneys and the liver and spleen. Most of the drug is excreted in the faeces but 10% to 20% is excreted in the urine and this proportion rises in patients with liver disorders.
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