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以恒定速度在人体内持续释放药物的技术正在发展中。治疗哮喘的新型舒喘灵(Sal-butamol)只需每日服药二次,每次一片,不需服用4次。此药在英国已出售。新舒喘灵从胶囊释放活性成份,作用方式不同。胶囊能在控制速度下长时问释放药物。控制释放克服了传统用药的一些问题。例如,医师要求病人每天服药4次,病人往往不能在半夜起床保证服药(每隔6小时一次)。结果使血流中药物浓度极高或极低而不一致。
Techniques for sustained release of drugs at a constant rate in the body are under development. The new Sal-butamol for asthma is administered twice a day, one tablet at a time, without taking 4 doses. This medicine has been sold in the UK. New Schistrain release capsules from the active ingredient, the role of different ways. Capsules can release medication at long intervals of control. Controlled release overcomes some of the problems with traditional medication. For example, a physician requires a patient to take medication four times a day, and patients often can not get up in the middle of the night to take their medication (every six hours). As a result, the concentration of the drug in the bloodstream is extremely high or low and inconsistent.