The cough meds might work for some, but it was a waste of money for us. The first few weeks, it is more like a cold that won't go away. It gets very serious after that. Things that made it worse: meal time, and bed time, getting food down them was very hard, my 2 yr old lost about 10 lbs she would get sick between 15-30 times a day. I am not exagerating. Bed time was bad too, about 5 min. after they would lay down, someone would get sick. Sometimes they would get sick in the middle of the night and not even know it. A friend of mine had a nebulizer, and we used it for about 3 weeks, daily.
I don't mean to sound horrible, but this is very serious, the health dept called my house to make sure we were not around other children to make an 'outbreak' in the community, there were 50 reported cases in the state at that time, we were 6 of them. I didn't realize how serious it was until I watched my newborn baby stop breathing many times, turning blue. My husband and father in law described the pain and fear you feel when you cough and you just can't get your next breath of air. Everything closes off, you can not breathe. That is why you hear the 'whoop' your lungs and airways are closing down, and it is only letting that tiny bit of air in. This is serious, pray to God for their healing. I am sure stress and physical activity make it worse. We laid around the house all day and would sit out on the porch on pretty days to get fresh air, but no activity whatsoever. Sometimes just laughing would bring on a spell of coughing and sickness.