Hi and Welcome, Pete!! 
It's good to see you here! When you get to the link you just have to maneuver around a bit on the site. Sometimes it's nice to just start conversations so we can talk to an actual person that has it.
Yes, allergy medications can cause this - a lot of them are antihistamines which dry your mucus membranes along with everything else. You can actually become dehydrated taking them. So very much a consequence of allergies.
Thanks for your thoughts!
Hugs, Teri