Lachesis is a frequently indicated remedy, and one that you will need to study much in order to know how to use. Lachesis seems to fit the whole human race, for the race is pretty well filled up with snake as to disposition and character and this venom only causes to appear that which is in man.
In many cases a close connection between the mental symptoms and the heart symptoms will be noticed, especially in young women and girls who have met with disappointment, who have been lying awake nights because of disturbance of the affections, or from disappointment, or from shattered hopes, or from grief. Prolonged melancholy, mental depression, hysterical symptoms, weeping, mental prostration and despair, with pain in the heart, with a gone sensation or sensation of weakness in the heart, with difficult breathing. She meditates upon suicide, and finally settles back into an apathetic state, in which there is an aversion to everything, to work, and even to thinking.