NATRIUM ARSENICOSUM DILUTION 
Natrium Arsenicosum is made from Arseniate of Sodium and also called as Natrum Arsenicum. It’s a very good remedy for Nasal catarrh and psoriasis.

Nose

Watery discharge; Feels blocked.
Pain at root of nose with Discharge that drops into throat
Crusts in nose, dry, makes inside of nose raw
Dropping of thick, bland, yellowish mucus into throat from nose.

Head

Pain in forehead and root of nose, over eyes.
Headache; worse pressure and tobacco smoke

Throat

Throat is Dark, purplish, swollen, oedematous i.e. diphtheria

Respiration

Suffocation of chest, heart and larynx
Asthma
Lungs feel as though smoke had been inhaled.
Racking cough with greenish expectoration

Dose- As prescribed by physician. Can be taken along with allopathic medicines.

Side Effects: None

Precautions

Maintain half an hour gap between food/drink/any other medicines and homeopathic medicine. 
Avoid any strong smell in the mouth while taking medicine e.g. camphor, garlic, onion, coffee, hing.

Use under medical supervision.