It used to be stated that these drugs are marked cardiac depressants; and the heart being invariably implicated in rheumatic fever, it is supposed that these drugs must be given with great caution.
All potassium salts if taken in large doses are cardiac depressants, they also depress the nervous system, especially the brain and spinal cord.
Some of them affect only certain portions of the nervous system, others have a much wider range of action; they may act in either case as stimulants or as depressants, and hence the symptoms produced by them vary very greatly.
How would you define depressants? Add your definition here.