Hello mam! Your husband has two different conditions correlated by one hives and rashes. first lets talk about your switching thing. both the brands have the same ingredient that is pseudo ephiderine ( a decongestant) with guanafesine (an expectorant) i think u were using oral mucinex d. rash explains it. Shift to sudafed but topical nasal spray. that will relieve your problem. is your husband young? the spinal stenosis might be the reason of difficult breathing if its at the thoracic (chest) level or cervicaal level( neck) for compressing the accesory muscles of brething supplying nerves. Sinuses need to be addressed. if its a chronic one which relapses again and again i would advise a sinus drainage with a trocar needle. confirm with x ray head and neck water view and lateral view. Now lets talk the spinal stenosis and its pain management. As the drugs has its effects. say no to aspirin, NSAIDS( non selective COX inhibitors) like all over the counter nsaids.. i would advise selective COX 2 inhibitors, they spare the gastric and renal troubles. Now lets discuss different tretment modalities available for this stenosis 1)medicines. Selective COX 2 inhibitors(celecoxib), Muscle relaxants( Tizanidine etc), oral opioids for short term basis, oral steroids for short term basis, TCAs like clomipramines desipramines only if not old, PGE1 analogs like limoprost, latanoprost etc, and MEMbrane stabalisers like gabapentin or carbamezapine. ( in descending order of potency the sever the disease the lower you can use) 2)Physical Therapy: he needs excercises different ways to help her muscles of hip and legs to avoid myelopathy(muscle) and neuropathy(nerves) 3)surgery: Decompressions will be needed if medicines are not helping 4) ESI (epidural steroid injections) they will help relieve the pain and inflammation. but avoid if bleeding tendencies are there like haemophilia, deranged pt aptt INRs platelets etc. Good Luck With your husband, you are playing a wonderful role as a wife for caring . I will be here if you need me. Regards dr Shafi Ullah Khan My Patient is My family