I have high blood pressure. Very congested nasal passage. I use mass-produced nasal spray daily. Coricidin HP does me no good. What should I use?

Get off of the spray. If you are using anything other than a nasal steroid or saline, you may have what's called rhinitis medicamentosa which may cause long-term damages to the nasal tissue. To wean you off the spray, you may need even a short-course of oral cortisone. If the symptoms recur after you have recovered, then consider seeing an allergist.