You're not allowed to take robitussin. I just got over all that, my professor whom is a doctor told me I could drink emergenC, it's in a packet like Theraflu and taste like tang.
I was feeling bad a couple days ago and was taking Robitussin and alternating it with Tylenol gels extra strength. It was helping me then they both just stopped helping and I went to the hospital today and found out I am positive for the flu and bronchitis. But the robitussin did help me I believe you can take it every 5 hrs?