Eczema Treatment Care

Hi! I am on the following medications:
Allegra-D 24-hour qd (for allergies)
Biaxin 500 mg bid (sinusitis)
Flovent 440 mcg bid (asthma)
Benadryl 50 mg q4h prn (I get a lot of rashes, so this is used and OK’d by my dermatologist to be taken with the Allegra-D, even though it’s 2 antihistamines — right now it’s for eczema and some contact dermatitis/hives)
… and now what I’m thinking of taking is a DuoNeb nebulizer treatment (Albuterol inhailer isn’t cutting it, and last time it was this bad, neither did the Xopenex, so I had to be put on oral steroids and DuoNeb [atrovent and albuterol]).
Can these things be taken together? Thanks so much!