Never try Robotussin - I was coughing hard last week and it did not help at all.
I tried Theraflu - warming relief - nighttime Severe cold - medicine and it worked.
Interesting - i bought Robotussin(sp) and worked really well for me! Guess it depends on the individuals.
Gina sorry to hear you not feeling well - cant believe you got it whilst living in DXB. Dont forget to drink lots of yakhni - chicken soup is the best remedy imo. Hope you feel better soon inshallah.