Do Albuterol And Benadryl Interact With Each Other, Decreasing Heart Rate?

I developed asthma last year around this time of year after back to back respiratory infections and bronchitis. I was prescribed albuterol to use as needed during my recovery. I didn t need it daily, but used it somE nights around bedtime when I d start to wheeze. By April, I didn t need it anymore. A few weeks ago I got another viral respiratory infection and the asthma flared up again by the end of the cold. I started needing my albuterol inhaler nightly because every time I laid down to sleep, I d get a tickle in my chest that wouldn t stop until I used the inhaler. I called my asthma and allergy doctor who prescribed me Qvar (80mg twice daily) which I started today. I ve also been having trouble sleeping (sometimes falling asleep, sometimes staying asleep) and waking up repeatedly overnight, which I m not sure is related to the asthma or the albuterol. Someone (not a doctor) suggested I might try taking benydryl at bedtime to help further with any possible allergies I may be suffering and also might help me sleep, too. I read online that mixing albuterol and benydryl could cause slow heartbeat or brain-oxygen issues. Is that accurate? Should I not mix these medicines?