There might be some difficulties before one understands the central idea of this remedy, because of its wide area of action in the body. The key characteristic to remember is the wet, damp environment. As H. Farrington writes in his ‘Homoeopathy and Homoeopathic Prescription’, if the susceptibility to dampness is absent, then Natrium sulphuricum is not indicated.
Though it is impossible to cure a person by treating only his physical body, still the mineral balance in living cells should be reinstated and kept that way. Therefore, while the homeopathic remedy chosen in potency above 30 C acts on the three levels – body, mind and spirit, Schuessler salts help the therapist to quickly remove the mineral disturbance in the affected tissues by adding the respective amount of mineral ingredients in the exact natural decimal dilution; and thus an adequate cure is achieved.