In the treatment of heart failure it is necessary to make use of all available therapeutic agents, to adapt them to the individual patient, and to adjust them to changing conditions. Overdigitalization, especially common in the presence of sinus rhythm, is as bad as inadequate digitalization. The reduction of sodium intake is important, but not all patients require extreme sodium restriction. Similarly the regulation of water intake, the administration of diuretics, and the use of acidifying agents like ammonium chloride and lysine monohydrochloride, to potentiate mercurial diuretics must all be individualized and adjusted by constant observation of the clinical manifestations and the patient's responses.
Friedberg CK. Treatment of Heart Failure with Emphasis on the Use of Diuretics. JAMA. 1960;174(17):2129–2131. doi:10.1001/jama.1960.03030170019004