Fossilized Dragon Teeth Classic Formulas

Primary Actions

Calms the spirit and relieves agitation - Long Chi is used for insomnia, fright, dream-disturbed sleep, and palpitations when heat and agitation disturb the Heart spirit.
Clears heat and settles convulsive disorders - traditional indication extends to epilepsy, spasms, and restless irritability when Liver wind or heat agitation is part of the presentation.
Anchors and quiets rather than richly nourishes - compared with sweeter spirit-calming herbs, Long Chi works through a heavy, settling mineral action.

Long Chi with Yuan Zhi, Fu Shen, and Ren Shen - classic spirit-calming pairing logic for fright palpitations and insomnia.
Convulsion-settling combinations with Gou Teng, Tian Ma, or Niu Huang - traditional strategy when agitation is accompanied by wind or seizure activity.

TCM Wiki describes Long Chi as astringent and cool, entering the Heart and Liver channels, with actions of clearing heat, relieving restlessness, relieving convulsion, and inducing tranquilization.
Classical teaching places Long Chi among the heavier mineral settling substances used when the treatment priority is to anchor disturbed shen and calm convulsive agitation.