I close this brief reference to the remoter consequences of the habits of the opium-eater by calling the attention of the reader to the physical weakness with consequent inaptitude for continuous exertion which forms a part of my own experience. Unable as I am to refer it to any _immediate_ cause, frequent and sudden prostration of strength occurs, accompanied by slight dizziness, impaired sight, and a sense of overwhelming weakness, though never going to the extent of absolute faintness. Its recurrence seems to be governed by no rule. It sometimes comes with great frequency, and sometimes weeks will elapse without a return. Neither the state of the weather, nor any particular condition of the body, appears to call it out. It sometimes is relieved by a glass of water, by the entrance of a stranger, by the very slightest excitement, and it sometimes resists the strongest stimulants and every other attempt to combat it. I can record nothing else respecting this visitant except that its presence is always accompanied with a singular sensation in the stomach, and that the entire nervous system is affected by its attack.
The inaptitude for steady exertion is not merely the consequence of this occasional feeling of exhaustion, but is for a time the inevitable result of the accumulated pain and weakness to which his system, not yet restored to health, is still subject. This impatience of continued application to work, which is common to all opium-eaters, and which does not cease with the abandonment of the habit, seems to result in the first case from some specific relation between the drug and the meditative faculties, promoting a state of habitual reverie and day-dreaming, utterly indisposing the opium-user for any occupation which will disturb the calm current of his thoughts, and in the other, proceeding from the direct disorder of the nervous organization itself. Strange as it may seem, the very thought of exertion will often waken in the reforming opium-eater acute nervous pains, which cease only as the purpose is abandoned. In other cases, where there is no special nervous suffering at the time, work is easy and pleasant even beyond what is natural.
One effect of opium upon the _mind_ deserves to be mentioned; its influence upon the faculty of memory. The logical memory, De Quincey says, seems in no way to be weakened by its use, but rather the contrary. His own devotion to the abstract principles of political economy; the character of Coleridge's literary labors between the years 1804-16, when his use of opium was most inordinate; together with the cast of mind of many other well-known opium-eaters, confirms this suggestion of De Quincey. His further statement that the memory of dates, isolated events, and particular facts, is greatly weakened by opium, is confirmed by my own experience. However physiologists may explain this fact, a knowledge of it may not be without its use to those who desire to be made thoroughly acquainted with all the consequences of the opium habit.