+1 on the BEER or was that water? Anyway, keep drinking plenty of fluids. This helps keep the cough away. This time of year especially as the air is drier as well.
I agree with drinking more water. The PG's minor side effect is the absorption of moisture from what I've read, absorb moisture from mouth, throat and lungs and since you don't generally feel anything in your lungs, throats are the one getting irritated most of the time. Drink more water and keep your body hydrated and you'll be fine. Anyone have any contradicting evidence please feel free to point me out, I'm still a relatively new vaper and would like to know more about everything!