This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Sulphur, Lotum or Washed S. and S. Pracipitatum are identical in effects and are classed as alterative, laxative, and antiparasitic. S. Sublimatum is rarely used as a laxative, but excels in local skin affections. Sulphuris iodidum acts largely as sulphur, and the dose is 1 to 4 gr. It is not a very stable chemical. In large doses (30 to 120 gr.) sulphur has been very unwisely used. In the system it is subject to so many chemical changes as to be unreliable in action, and its protracted administration causes anemia, muscular weakness, torpor of the venous capillaries, boils, and skin rashes. Externally, it has many uses, especially in scabies, and, as a lotion, in acne and other skin diseases; but internally, beyond a dose or two for its laxative effect, I believe it does vastly more harm than good in the large dose.
In small dose it is an open question just how much of a place sulphur should fill. The homeopaths make very extensive use of it in scrofulous indurations, mucous catarrhs, ulcerations, complaints that relapse, suppurating skin lesions, and diseases characterized by inertia and relaxation of tissue. They claim that minute doses promote resolution of pneumonic hepatization and relieve venous capillary stagnation, but they cloud the subject with a maze of subjective symptomatology verging upon the ridiculous. My own experience with their IX and 2x triturations leads me to say that while they will do very little in most conditions they designate, yet I have gotten better results with them in skin diseases than I have with the crude drug.