One of the most frequently corroborated symptoms of this remedy is the modality– worse BY MENTAL EXERTION. The patient is unable to think or perform any mental labor without headache(ARG-N.,SABA.,)vertigo or a sense of stupefaction. This symptom alone makes it an invaluable remedy,as we often come across that type of patient. At least I have,and have frequently gained great credit by relieving them. I generally use the 30th potency here. Again this kind of headache is apt to be worse on exposure to the sun’s rays or under gas light. Persons suffering from overheating from the sun may find relief from NAT-C.,GLON., LACH.,or LYSS.,Like the other NATRUMS,the carbonate is GREATLY DEPRESSED IN SPIRITS, wholly occupied with sad thoughts. It is one of our best remedies for chronic catarrh of the nose,which extends to the posterior nares and throat. There is violent hawking and spitting of thick mucus that constantly collects again.(CORALL) Although never produced in the proving,clinical use has proved it a great remedy for “bearing down” pains. Here the concomitant symptoms of mind,sadness,over- sensitiveness to noise,especially music, etc., will confirm its choice. Weakness of the ankles from childhood finds a good remedy in NAT-C.,I cured a very bad case in a young man who was very fleshy and walked on the inside of his ankles,feet bending outward,from such weakness,his ankles refusing to support him,especially when a little over- fatigued. Those are the only uses of NAT-C.,that I know from personal experience or observation.
Therapeutic use of homeopathic remedy Natrum Carbinicum described by E.B. Nash in his book Leaders in Homeopathic Therapeutics, published in 1898.