Mercurius proto iodide
Mercury(I) iodide (mercurous iodide, Hg2I2) · Mineral
Mercurius Protoiodatus is suited to scrofulous and syphilitic patients whose mucous surfaces are covered with squamous epithelium. The remedy has a medicine-of-concomitants quality, with pains appearing simultaneously in distant parts. It affects patients sensitive to cold damp weather and draughts while perspiring, with a tendency to right-sided affections that extend to the left.
Key symptoms
- Thick dirty yellow coating at base of tongue; tip and edges red
- Throat symptoms right-sided, worse from warm drinks and empty swallowing
- Cervical and parotid glands enormously swollen
- Tenacious mucus accumulating in throat difficult to dislodge
- Teeth feel too long; irresistible desire to clench teeth in sleep
- Nausea at sight of food; faint sick feeling in hypogastrium
- Corneal ulcers looking as if chipped out by a finger-nail
- Black stools
- Pain in right forearm and left hip simultaneously
Worse (aggravation)
- Night; before 1 a.m.; on waking
- Rest
- Lying on left side
- Warm room; warmth of bed
- Warm drinks (throat symptoms)
- In spring
- Writing (arm pain)
- Touch and pressure
Better (amelioration)
- Lying on right side (tired feeling relieved)
- Mind and body actively engaged (headache relieved)
- Pressing hand on liver region (stitching pain relieved)

Mercurius iodatus. Green Iodide of Mercury. Mercurious iodide. HgI. Trituration.
Clinical
Blepharitis ciliaris. Breast, tumour of. Catarrh. Chancre. Crusta lactea. Diphtheria. Eyes, syphilitic affections of. Goître. Intra-ocular affections. Leucorrhœa; of children. Ozæna. Pregnancy, vomiting of. Scabies sicca. Syphilis. Throat, sore. Tonsillitis. Toothache. Writer's cramp.
Characteristics
Merc. iod. has had a valuable proving, which has developed a distinct individuality based on the general Merc. characteristics. Lyc. (which is complementary to Iod.) is strongly recalled by some symptoms of Merc. iod., and Lyc. relieved some of the symptoms of the proving. The right-to-left direction was manifested in the throat and chest symptoms; but unlike those of Lyc., the throat symptoms were < by warm drinks. Cervical and parotid glands enormously swollen. Much accumulation of tenacious mucus in throat. Merc. iod. has a strong characteristic in the tongue─a thick yellow coat at the base; anterior part …

Iodide of Mercury. (Hg2I2.)
Diphtheritic and throat affections where the cervical and parotid glands are enormously swollen; membrane begins on or is < on right side; < by warm drinks, and empty swallowing (Lach.). Tongue: thick, yellow coating at base (Kali bi. - golden yellow coating at base, Nat. p.; dirty or greenish-gray coating at base, Nat. s.); tip and edges red; right side of throat and neck most affected. For Hunterian (hard) chancre, secondary symptoms rarely follow if given in proper dose; great swelling of inguinal glands, no disposition to suppurate.

Sight and Eyes
Superficial ulceration of the cornea and other especially scrofulous affections of the eyes, accompanied by thick yellow coating on base of the tongue.
Mouth and Throat
Base of tongue covered with a thick, dirty yellow coat.
Male Sexual Organs
Hunterian (hard) chancre. (Secondary symptoms rarely follow if given in the 1000th potency).
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