Hello, My 81 year old mother has congestive heart failure. Two weeks ago she also developed a terrible productive cough and sinusitis. She is spitting up mucus. She has no chest pain, fever, or unusual trouble breathing, but her chest and cough sound very congested and full. Also, the sinus drainage and coughing are keeping her awake at night. If I keep her on Benadryl and Robitussin she gets some relief, but if she misses a dosage the symptoms come back quickly.