This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sympathetic System, Subject name: Pharmacology
The only non-catecholamine sympathomimetic drug out of the following is: 
Select and explain. 
A. Adrenaline, B. Ephedrine, C. Dopamine, D. Isoprenaline
B: Ephedrine
Answer: B: Ephedrine 
Explanation: Sympathomimetic drug Catecholamines Non catecholamines Endogenous * Adrenaline * Nor adrenaline * Dopamine Exogenous * Dobutamine * Fenoldopam * Isoprenaline Rest all More information:Indirectly acting sympathomimetic drugs are:1. Reuptake inhibitors: Cocaine, TCA.2. Displacement of catecholamines from vesicles:* Tyramine- shows tachyphylaxis.* Ephedrine* Pseudoephedrine