How do i get relief from nasal congesgtion if i have a heart condition and can't take decongestants?

Antihistamine: The decongestant that you cannot take is phenylephrine. This medication can be sold individually or packaged with other medications when the label indicates "-d" such as claritin-d. Antihistamine, on the other hand, is not a problem for most patients with heart disease.

Nasal sprays: You could consider using prescription nasal steroids. See a doctor about this.