Celsus, De Medicina
W. G. Spencer, Ed.

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16 But if there is a double quartan fever, and those exercises which I have mentioned cannot be adopted, either the patient should rest entirely, or if that is difficult walk quietly, then sit with his feet and head carefully wrapped up; as often as a paroxysm has recurred and has remitted, he should take food in moderation and wine; for the remainder of the remission, unless there is urgent weakness, he should fast. But if two paroxysms are almost continuous, he should take food after both are over; then in the intermission he should move about a little, and after being anointed take food. Now since an inveterate quartan is seldom got rid of except in the spring, it is at that season especially that attention is to be given, lest something occur to hinder recovery. And it is of advantage in an old quartan to later now and then the class of diet, and change from wine to water, from bland food to acrid, from acrid to bland; to eat radish, then to vomit; to move the bowels by shell-fish or chicken broth; to add heating agents to the oil for rubbing; before the paroxysm to sip two cups of vinegar, or one cup of mustard in three of Greek salted wine, or pepper, castoreum, laser and myrrh in equal proportions in water. For by these and such-like remedies the system is to be stirred up in order that it may be moved from the state in which it is being held. When the fever has quieted down, for a long while it is well to keep in mind the day on which it occurred, and on that day to avoid cold, heat,[p. 289] indigestion, fatigue: for fever readily recurs unless even a convalescent patient fears that day for some time to come.