How do cough syrups work if trachea and foodpipe are different? We take cough syrups into food pipe and not in the windpipe. Then, how does it work?

How do cough syrups work if trachea and foodpipe are different? We tak

1.	How do cough syrups work if trachea and foodpipe are different? We take cough syrups into food pipe and not in the windpipe. Then, how does it work?
Answer» SORRY I didn't KNOW about the QUESTION