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Study of two controlled-release theophylline preparations

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      Abstract

      Two sustained-release theophylline preparations, one a 12-hour and the other a 24-hour product, were compared in 20 subjects with stable asthma. All patients had good control of symptoms, and the calculated pharmacokinetic parameters were comparable for both drugs. The 24-hour sustained-release preparation can thus be utilized in the therapy of asthma.
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