Below are the main rubriks (i.e strongest indications or symptoms) of Merc Viv in traditional homeopathic usage, not approved by the FDA.
Weakness of limbs
Bone-pains and in limbs; worse, night
Patient very sensitive to cold
Trembling extremities, especially hands; paralysis agitans
Lacerating pain in joints
Cold, clammy sweat on legs at night
Dropsical swelling of feet and legs.≡ more ...