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美息伪麻片（商品名白加黑片）是国产的新型抗感冒药，有日用和夜用两种片剂，经药效学研究表明日用片具有降低内毒素，致热家兔体温，提高小鼠痛阈，抑制豚鼠鼻粘膜和家兔球结膜的毛细血管通透性以及镇咳作用；夜用片尚有镇静和抗组胺作用。这些效应均随着剂量的增加而增强，说明该药能减轻感冒时发热、头痛、鼻塞、流涕和咳嗽等症状，夜用片睡前使用能进一步减轻感冒引起的不适并有助于病人的睡眠。
The beauty of the pseudo-Ma flakes (white plus black tablets) is a new domestic anti-cold medicine, daily and night with two tablets, the pharmacodynamics studies have shown that daily use of tablets to reduce endotoxin, rabbits caused by heat Body temperature, increased pain threshold in mice, inhibition of guinea pig nasal mucosa and rabbit bulb conjunctiva capillary permeability and antitussive effect; night tablets still sedative and antihistamine effect. These effects are increased with increasing dose, indicating that the drug can reduce the flu cold, headache, stuffy nose, runny nose and cough and other symptoms, night-use tablets before going to bed can further reduce the flu caused by the discomfort and help the patient’s Sleep.