panting and pacing

Question
Hi. My 13 year old lab mix pants heavily, but only at night.  She is fine during the day...sleeps, eats, hangs out.  But, every night she pants and paces for hours until falling asleep around 3am.  She was diagnosed with a mild case of laryngeal paralysis a few weeks ago.  She is on a bronchadialtor (theophylline) twice a day.  She is also on benadryl twice a day incase it might be allergies.  She has moderate arthritis, and is on 150mg of tramadol twice a day, 75mg of rimadyl twice a day, fish oil pills, glucosomine, and levothyroxine for hypothyroidism all twice a day.

She has a doctor's appt on Tuesday for them to test for Cushing's Disease.  I requested this test, since she has many of the symptoms.  

Do you have any idea why she is totally fine all day long, and then does this for hours every night?  I thought she might not like the dark, so I turned every light on in the house...she is still panting and pacing like crazy.

Please let me know any ideas you have.  She had an x-ray 2 weeks ago on her throat and chest.  The doctor said her heart and lungs looked fine - no masses.  

I hope she is not in pain.  It's just so weird that it only happens at night.  When she sits outside it seems to get a little better, but the second she steps back inside, the panting and pacing start all over.  

Please help!!

Heidi

Answer
As long as you are certain the dog isn't overmedicated, I would keep an open line of communication between you and your vet and be sure they are aware of your concerns and the dog's symptoms.  Maybe her pacing and panting is a side effect of the medications?  It sounds like someone who is "wired" and can't sleep.

I do not have any medical background, so your vet would be the best source of information.