Sanguinaria canadensis
από Henry N. Guernsey — Key-Notes to the Materia Medica
We find this very useful where there is a pain rising from the back of the neck over the top of the head, running down into the forehead; this symptom may occur alone, or in connection with some other trouble. Headache begins in the morning, gets worse during the day, and lasts until evening. Comes every seventh day (Sabad., Silic., Sulphur). This remedy is also often useful for troubles occurring in females at the climacteric period of life--such as flashes of heat, etc. Rheumatism of right shoulder.