This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Neoplastic Agents, Subject name: Pharmacology
Which of the follow ing is not an analeptic agent? 
Select and explain. 
A. Doxapram, B. Nikethamide, C. Doxacurium, D. Propylbucamide
C: Doxacurium
Answer: C: Doxacurium 
Explanation: Ans: C (Doxacurium) Ref: A Complete Textbook of Medical Pharmacology S.K. Srivasthava, Vol 1, Avanchal Publishing Company 764Explanation:Doxapram. Nikethamide. Prethcamide are the analeptics, stimulate the medullary centre.Nikethamide is now withdrawn due to the risk of convulsion.Doxacurium is a competitive neuromuscular blocker while other drugs are known respiratory stimulants.