This is a solution of the _Arsenite of Potass_, coloured and flavoured
by the _Compound Spirit of Lavender_, fʒj of which contains gr. ½ of
_arsenious acid_. It was introduced into practice by Dr. Fowler of
Stafford, as a substitute for the empirical remedy known by the name of
“_The Tasteless Ague Drop_.” It is a powerful tonic, and has been very
successfully administered in the cure of intermittent and remittent
fevers, periodical headaches, and as an alterative in many anomalous
diseases of the skin. It has been also given, with decided effect, in
certain visceral obstructions; its use however is to a great degree
empirical, although we may observe, generally, that wherever strong
arterial action exists, arsenic will do harm. The addition of a few
drops of _Vinum Opii_ is said to render its operation safer and more
efficacious. INCOMPATIBLE SUBSTANCES. _Lime water_; _nitrate of silver_;
_the salts of copper_; _hydro-sulphuret of potass_, and _the infusions
and decoctions of bark_. DOSE, ♏︎iv, gradually increased to ♏︎xxx, twice
a day. See _Arsenicum Album_.