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  • Title: On the influence of concomitant food intake on sulfonamide bioavailability.
    Author: Melander A, Wåhlin E, Danielson K, Rerup C.
    Journal: Acta Med Scand; 1976; 200(6):497-500. PubMed ID: 1015360.
    Abstract:
    The influence of food intake on the bioavailability of a frequently used short-acting sulfonamide, sulfaisomidine (Elkosin), has been examined in eight healthy volunteers. The drug was administered as a single oral dose, both on an empty stomach and together with a standardized breakfast. Numerous venous blood samples were drawn for the first eight hours after ingestion of the drug, and the concentration of unmetabolized sulfonamide in serum was assessed by spectrophotometry. The observations indicate that concomitant food intake alters neither absorption rate, peak concentration, time to reach peak concentration, elimination rate, nor total amount of sulfonamide reaching the general circulation. Thus, the absorption of orally administered sulfaisodimidine is not at all affected by concomitant intake of food. This finding contrasts with previous observations on some other sulfonamides, and it may signify a therapeutic advantage of sulfaisodimidine. In addition, the amount absorbed showed only a little interindividual variation. This suggests that the use of standardized size and interval of sulfaisodimidine dosage can be recommended. The present findings emphasize that conclusions about the absorption of a certain drug should not be derived from studies with other, albeit chemically related, compounds.
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