Sodium salts have not the depressant effect so marked in those of potassium.
Potassium nitrate was used at one time in many different diseased conditions, but it is now never administered internally, as its extremely depressant action upon the heart is not compensated for by any useful properties which are not possessed by many other drugs.
Emetine acts as a gradual depressant to the nervous system in animals.
But on account of this depressant action it is to be avoided for women and children and rarely used for men.
In large doses it has a depressant action on the nervous system, leading even to coma and total abolition of reflex action.
Similarly the depressant action on the respiratory centre in the medulla oblongata occurs only after the administration of enormous doses.
This is accelerated by a marked depressant action upon the heart, similar to that produced by veratrine and aconite.