Caffeinum
Allen, Supplement to the Encyclopedia of Pure Materia Medica, 1879, Vol. X, p. 473
Authority. 5, Dr. Kelp, Memorab., 22, 1877 (S. J., 176, 220), a woman took two powders of the citrate, each containing 0.24 gram.
She was seized with remarkable restlessness and dizziness, and could not keep erect. Violent precordial anxiety, palpitation. Abdominal pulsation. Violent trembling of all the extremities. Grating of the teeth. Features expressive of the greatest anxiety. Feeling of constriction of the neck and throat, recurring periodically every fifteen minutes. Pulse very rapid. This condition lasted three hours, and gradually disappeared,^