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.
I have often known taeniae dislodged and passed under the use of small doses of the sulphate; about 1/6 gr. in solution is a suitable amount to commence with, and may be given every morning, fasting. If this dose be steadily and gradually increased, upward of 3 to 5 gr. may be administered without causing vomiting or purging; but should these symptoms occur, the medicine is better omitted for the time, to be resumed in smaller doses if required again. This treatment should be continued for eight to ten days or longer, an occasional dose of castor-oil being given when necessary.