In respect to food it seems impossible to lay down any general rule. De Quincey advises beefsteak, not too much cooked, and stale bread as the chief diet, and doubtless this was the best diet for him. Yet it is not the less true that "what is one man's meat is another man's poison," and food that is absolutely harmless to one may disorder the entire digestion of another. Roast pork, mince pies, and cheese do not, I believe, rank high with the Faculty for ease of digestion, yet I have found them comparatively innoxious, while poultry, milk, oysters, fish, some kinds of vegetables, and even dry toast have caused me serious inconvenience. The appetite of the recovering opium-eater will probably be voracious and not at all discriminating during the earlier stages of his experiment, and will continue unimpaired even when the stomach begins to be fastidious as to what it will receive. Probably no safer rule can be given than to limit the quantity eaten as far as practicable, and to use only such food as in each particular case is found to be most easy of digestion.
Too much prominence can not be given to bodily exercise as intimately connected with the recovery of the patient. Without this it seems to me doubtful whether a person could withstand the extreme irritation of his nervous system. In his worst state he can not sit still; he must be moving. The complication of springs in the famous Kilmansegge leg, is nothing compared with the necesity for motion which is developed in the limbs of the recovering opium-eater. Whatever his health, whatever his spirits, whatever the weather, walk he must. Ten miles before breakfast will be found a moderate allowance for many months after the habit has been subdued. A patient who could afford to give up three months of his time after the opium had been entirely discarded, to the perfect recovery of his health, could probably turn it to no better account than by stretching out on a pedestrian excursion of a thousand miles and back. This would be at the rate of nearly twenty-six miles a day, allowing Sunday as a day of rest. This advice is seriously given for the consideration of those who can command the time for such a thorough process of restoration. Nor should any weight be given to the objection that the body is in too enfeebled a state to make it safe to venture upon such an experiment. Account for it as physiologists may, it is certain that the debilitating effects of leaving off opium much more rapidly pass away from the lower extremities than from the rest of the body. At no time subsequent to my mastery of opium have I found any difficulty in accomplishing the longest walks; on the contrary they have been taken with entire ease and pleasure. Yet to this day, any considerable exercise of the other muscles is attended with extreme debility. In the absence of facilities for walking, gymnastic exercise is not wholly without benefit, and if this exercise is followed by a cold bath, some portion of the insupportable languor will be removed. Walking, however, is the great panacea, nor can it well be taken in excess. So important is this element in the restorative process that it may well be doubted whether without its aid a confirmed opium-eater could be restored to health.