Dd, 14, has been up all night coughing. She kept us awake with it too 
She has had the awful virus that's doing the rounds and now just has this dry cough. She's coughing literally every 5 seconds and she's exhausted.
Have tried Vicks (on throat and chest and feet!) honey and lemon drinks, steam - with and without menthol - and covonia for dry coughs as well as foods with lots of garlic, ginger and onions.
Any other suggestions?
Any advice?