anxiety and desperation. The desperation forces him to move from place to place with the hope that he will find some relief. Again, the restlessness tires the patient and leads to exhaustion. There may be periodicity to the restlessness: the patient will move about for a while and then be able to rest until the urge to move again asserts itself. The restlessness is, of course, most intense during the night, especially after midnight.
While the restlessness of Arsenicum is generally due to anxiety, a purely physical restlessness also occurs. This type of restlessness may often create confusion with Rhus toxicodendron. Both remedies can have a craving for milk, and both can have a desire for water in small quantities frequently. Both are aggravated by cold. Generally, Rhus toxicodendron is restless because the pain and stiffness are ameliorated by movement; turning, stretching, bending and moving about offer relief. In Arsenicum no relief is afforded by restless movement; the restlessness, provoked by the suffering, actually aggravates by bringing about exhaustion. Rhus toxicodendron patients repeatedly move from place to place because they hope to find a more comfortable position; one of the most typical examples of this tendency is to stretch and move the legs in bed at night – they do not know where to put their legs.
Sulphur and Medorrhinum may have a similar restlessness of the legs and, likewise, a difficulty in knowing where to put their feet, but they do this because they are trying to find a cool place for their overly warm feet (and burning soles).
Another remedy that must be differentiated from Arsenicum is Tarentula hispanica. The restlessness of Tarentula arises from a great hurriedness that pervades all aspects of life. They want everyone to hurry; they become irritable if they see someone moving slowly. Naturally, in a very advanced stage where the patient is out of control, one can have a very difficult time diagnosing the remedy. Tarentula, Stramonium, Nux vomica, Arsenicum, Hyoscyamus – all, as they shout, break things, and run about the room, can appear similar. Were one to attempt to distinguish Tarentula from these other remedies on the basis of an amelioration from music, one would have to be very circumspect. Tarentula’s restlessness can be aggravated by music (as can Natrum carbonicum); the restlessness can increase in concert with the rhythm of the music.
Causticum is a remedy which can have much restlessness. This restlessness is a result of the stiffness and is worse during sleep. There is