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.
Dilute sulphuric acid has a well-deserved reputation in various forms of intestinal flux, and especially in summer diarrhoea of choleraic character: it often answers well, but when given alone I have sometimes found it aggravate the disorder, whether by irritation or by increasing the acidity of secretions: the aromatic sulphuric acid should then be preferred in combination with some preparation of opium.
In diarrhoea, with coated tongue and evidence of biliary disorder, the acid has acted admirably with small doses of magnes. sulph., tinct. rhei., and aqua chloroformi: it is a good remedy for children.