Khi uống thuốc cảm, tại sao hay buồn ngủ?
Cập nhật: 07:43 12/06/2012 GMT+7
Các loại thuốc dùng trong cảm cúm, ho, sổ mũi, viêm mũi dị ứng thường được quảng cáo khá nhiều trên các phương tiện thông tin đại chúng.
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