Below are the main rubriks (i.e strongest indications or symptoms) of Acid Phos in traditional homeopathic usage, not approved by the FDA.
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Drowsy, apathetic; unconscious of all surroundings but can be aroused to full consciousness.
Chronic effects of grief; hair turns gray; hopeless, haggard look.
Grows too fast and too tall; young persons with growing pains in bones.
Great physical and mental weakness from ovarian or sexual excesses.
Diarrhoea WHITE, watery, painless, with rumbling; meteorism; but not so much weakness as would be expected.
Very profuse, watery, or milky urine.
Modalities worse bad news, depressing emotions; masturbation or sexual excess, draft; wind; snowy air; better after short sleep.
Headache of school girls from eye strain, or overuse of eyes, occipital. Chest, weak from talking or coughing; cough, purulent, offensive expectoration, and pains in chest. Salty expectoration in proving.
Now Phosphoric acid, properly exhibited, may be of incalculable benefit in such cases. It will sometimes be a choice between Phosphoric acid and Natrum muriaticum or Calc Carb Calcarea Phosphorus phos., the other symptoms must decide.
Opium surpasses them all in its stupefying powers, and the face, breathing and general appearance, is not at all, like Phosphoric acid.
Young boys even suffer from the effects of the orgasm of onanism before there is much or any semen secreted. This is well to remember in a choice between these two remedies. There is a condition in which I have found Phosphoricum Acidum very valuable, especially in men. The leading symptom is a "weak feeling in the chest from talking." You remember Stannum Iodatum Stannum has this symptom very strongly (also Sulphur Sulphur) and may lead us into a wrong prescription if only the one symptom were considered. If the patient is a young man, married or single; if, again, he seems weak in mind, listless, apathetic, reticent.
The first is found with general nervous depression, and if there is headache it is like Gelsemium Sempervirens Gelsemium relieved by the flow of urine. The other is from excess of phosphates in the urine, indicating nerve waste. We must distinguish between the profuse urine of Ignatia Ignatia and Phosphoric acid, for the first is hysterical, the latter not at all so.