This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In such conditions phosphorus has long had a reputation, and was much valued by early authorities, but modern experience has limited its powers. If the special exhaustion referred to be only part of a generally enfeebled state, it will doubtless improve as general tone and vigor improve, but this system is not to be stimulated apart from the others; indeed, if it were so, this might be a serious drawback to the ordinary use of the remedy. I may say, however, that in some of my own cases an irritable, weakly condition of the sexual organs, traceable to previous early abuses or subsequent excesses, has been much benefited by steadily continued doses of 1/200 to 1/100 gr. thrice daily.