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日本生产的Vcntax,是无水茶碱制成的微粒制剂,由于微粒有半透膜覆盖,口服后均匀缓慢地释放出茶碱,能较恒定地保持有效的血药浓度。
Japan produced Vcntax, anhydrous theophylline made of the microparticle preparation, the microparticles are covered with semipermeable membrane, after oral administration of theophylline evenly and slowly, can maintain a more effective blood concentration.