Drugs that affect mood are few. Alcohol produces in many persons euphoria which is followed by depression, although the changes in mood brought about by alcohol are so diverse as to give rise to the famous aphorism in vino veritas, meaning that the true underlying mood of the person comes out while he is drunk. Narcotics deaden the personality and thus bring about an escape from an intolerable mood. The anesthesia of mood which is sought and obtained by this means is purchased at an enormous price, so far as personality worth is concerned.
Caffeine, in the form of tea and coffee, has a place in the daily habits of the human being largely because of the mild toning-up process which takes place. In most instances the use of drugs to banish fatigue and depression has little to recommend it except in the case of strychnine and caffeine.
Myerson A. EFFECT OF BENZEDRINE SULFATE ON MOOD AND FATIGUE IN NORMAL AND IN NEUROTIC PERSONS. Arch NeurPsych. 1936;36(4):816–822. doi:10.1001/archneurpsyc.1936.02260100143005
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