Mercurius Iodatus Ruber [merc-i-r]
Again, if in a Merc. patient with diphtheria, tonsillitis, etc., the inflammation and pain begin on the <left> side, and incline to remain there or spread to the right, the bin-iodide is indicated.
These two iodides (merc-i-f and merc-i-r) have more rapid and greater induration beneath ulcers and chancres than <Merc.>, and in old syphilitics the iodides are sometimes more useful.
Maharana Homoeo Reader