Robitussin DAC liquid should not be used in CHILDREN younger than 6 years old without first checking with the child's doctor; safety and effectiveness in these children have not been confirmed.
Read more at http://www.drugs.com/cdi/robitus ... 13vxw62iuJUJyHgH.99
不过中文网站确实只说一岁以下需要咨询医生。药品的作用原理中英文网站倒是一致:
Robitussin DAC liquid is used for:
Relieving congestion and cough due to colds, flu, or hay fever. It may also be used for other conditions as determined by your doctor.
Robitussin DAC liquid is a decongestant, cough suppressant, and expectorant combination. The decongestant works by constricting blood vessels and reducing swelling in the nasal passages. The cough suppressant works in the brain to help decrease the cough reflex to reduce a dry cough. The expectorant loosens mucus and lung secretions in the chest and makes coughs more productive.
Read more at http://www.drugs.com/cdi/robitus ... 13vxw62iuJUJyHgH.99