Is apparently formed in muscle tissue during the stage of muscle exhaustion. Differs from ordinary Lactic acid in its relation to polarized light. It represents a much broader and more profoundly acting drug and its pathogenesis is quite dissimilar from the normal acid. Proved by Wm. B. Griggs, M. D, who found it of great value in the most violent form of Epidemic influenza, especially with violent and retching and greatest prostration, when Arsenic had failed. Spinal neurasthenia, muscular weakness, dyspnea with myocardial weakness.
Tired feeling with muscular prostration, worse any exertion. Sore feeling all over, worse in afternoon. Restless at night. Difficulty in getting to sleep. Tired feeling in morning on getting up.
Constriction in pharynx. Sore throat with tightness in naso-pharynx. Tickling in throat.
Nausea. Uncontrollable vomiting even of water followed by extreme weakness.
Back and Extremities
Tired feeling in back and neck and shoulders. Paralytic weakness. Wrist tires easily from writing. Extreme weakness from climbing stairs. Stiffness of thigh and calves. Arms feel as if no strength in them. Cramp in the calves.
Sixth to 30th potency. The 15x most marked action (Griggs).
Reference: "Pocket Manual of Homeopathic Materia Medica & Repertory" by William Boericke