The conversation between human and AI assistant.
Why does cough syrup make you feel drowsy?
Oh, I see. So, is there a difference between non-drowsy cough syrup and regular cough syrup?
Yes, there is. Non-drowsy cough syrups generally contain different active ingredients, such as phenylephrine or pseudoephedrine, that work to constrict blood vessels in your nasal passages and reduce inflammation. These ingredients do not affect the chemicals in your brain that cause drowsiness.