Lately meaning the last few days I have been having dry mouth. It is in the back upper roof of my mouth. My lips are also excessively dry, and sometimes the rest of my mouth.

I am 6'2 and 350 or so lbs. I dont really eat all to much sugar and every time I have been blood tested in the past which is as recent as 6 months ago I showed no signs of diabetes. I am also on Effexor XR and Doxycycline, though I have been on the effexor for a while and never had this, but just recently started the Doxycycline.

any ideas,.