Some tolerate PG over VG, and some tolerate VG over PG. It will definitely dehydrate you and you should drink plenty of water. I know since I started vaping, I drink more liquids. Also, when I first started vaping, I got chapped lips. It went away and I've never had a problem with it again, and I've been vaping about a 1 1/2 years. I think maybe at first your body has to adjust to 1) getting off the chemicals and going through the withdrawals from the chemicals of cigs, and 2) getting used to vaping. If it still bothers you alot after being sure to stay hydrated, try maybe 100% VG or 100% PG and see if either one is best for you. But otherwise, it does take a little bit of getting used to at first and I think it's normal. Also keep in mind that when you quit smoking cigs, your body will also get rid of alot of phlegm and go through issues like that as well. Some people have said they coughed up a ton of stuff at first until their lungs got clean of the stuff from cigs.