Ice berg symptoms and conditions

I was on it for 2 weeks for an upper respiratory infection and I have mild asthma. I got to the point after the 2nd week I could not feel my legs, they felt detached. I cried. I thought I was water in car when I drove to a doctor appointment. I felt like I had the flu 24 hours a day. No headaches but it never touched my asthma. Two weeks of that junk then I went to a doctor who put me on my medication I took as a kid. One pill and it was over.
Sudafed in my opinion is a dangerous drug. Those side effects they list on tv are a joke. They are the tip of the ice berg.