allergic rhinitis
"I started taking Singular generic brand about a week ago when my allergies got really bad to the point of not being able to function.  I was constantly sneezing, running nose, congested at the same time and watering eyes.  I am on once a week allergy shots for the past 25 years, run the air filter and keep a clean house with hardwood floors.  I have been taking half a pill of Xyzsal for the past couple of years.  Now, I took the Singular with the Xyzsal and started having nightmares almost every night.  Before, I used to dream often, occasionally had nighmares, but not that often.  Now, I have nightmares every night instead of random dreams that I can remember them even when I wake up.  My allergies are still bad but tolerable."