Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Phosphoricum in traditional homeopathic usage, not approved by the FDA.
Have you ever used Natrum Phosphoricum? Yes No
Accumulation of mucus in throat,
Tough, clear, white phlegm from posterior nares,
Dropping of thick yellow mucus from posterior nares; worse at night; awakens him; he must sit up to clear his throat,
Much hawking from posterior nares (have had this before), (fifty-eighth day),
Sensation of lump in throat (one hundred and third day),
Right side of throat sore,
Sensation as of a pin pricking right side of throat; worse swallowing liquid; better from solids,
Momentary throbbing in region of left tonsil (one hundred and thirty-ninth day),≡ more ...