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  • Title: Sustained release of sulphadiazine.
    Author: Wise DL, McCormick GJ, Willet GP, Anderson LC, Howes JF.
    Journal: J Pharm Pharmacol; 1978 Nov; 30(11):686-9. PubMed ID: 31430.
    Abstract:
    An implantable system was developed which released sulphadiazine in mice over an extended period of time efficacious against infective challenges by Plasmodium berghei. The most successful preparation was a copolymer of L(+)-lactic acid + (+/-)-lactic acid (90 and 10% by weight, respectively) with a molecular weight of 150 000, with which sulphadiazine was mixed at 33.3% of the total weight, in a formulation as beads of 1.5 mm diameter. This preparation released sulphadiazine at a nearly constant rate over three months as measured by the appearance in urine of mice of radioactivity from [35S] sulphadiazine in transplanted material. When implanted in mice, the beads gave effective protection against repetitive (weekly) infective challenges with P. berghei by implanted beads at dosages equivalent to 57 mg kg(-1) sulphadiazine and greater over 21 weeks.
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