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Essence of Materia Medica – page 199

TARENTULA HISPANICA (tarent.)
Tarentula hisparuu., although it has many symptoms in common with other remedies mentioned, it also has a particularly distinc-" tive personality.
The primary focus of action of Tarentula, especially in the first stages, is on the nervous system. The nervous system in Taren¬tula seems wound up tight like a coiled spring, tense with bound¬less energy which must be expended to prevent it from breaking. The Tarentula patient is compelled to be busy, to act, to move constantly without ceasing. The early stages may be found most characteristically in people in occupations requiring much detailed work while under great pressure and responsibility, such as air traffic controllers or news journalists confronted with deadlines. The constant pressures result in a keyed up, oversensitive ner¬vous system. Like Nux vomica, the Tarentula patient may initially be a compulsive worker. Such people seem to have super-human stamina, capable of and even compelled to work day and night, perhaps without sleep for weeks on end. They are industrious, capable, efficient; but unlike Nux vomica which is driven by a mental ambition and competitiveness, the Tarentula patient is driven by the nervous tension, the sheer compulsion to move and to keep busy.
Tarentula is—along with Sulphuric acid—the most hurried of all the remedies listed in the Repertory; many are listed in this rubric in strong grades, but Tarentula and Sulphuric acid lead them all. There is constant restlessness, most particularly of the lower extremities, but also of the entire body. Other remedies are char-acterised by such restlessness, but not to the extreme degree of Tarentula. The Tarentula patient will spend the whole night tos-sing and turning in bed until he finds himself with his head at the foot of the bed and the sheets tied in knots.
The Tarentula restlessness and nervous tension affects primarily the nervous system from the cerebellum and downward into the spine. Reading the Materia Medicas, the collection of symptoms belonging to it seem often inseparable from Arsenicum, but the