This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
Respiratory depression is caused by NE 
Select and explain. 
A. Opium, B. Barbiturate, C. Strychnine, D. Gelsemine
C: Strychnine
Answer: C: Strychnine 
Explanation: C i.e. Strychnine Strychnine is a CNS and respiratory stimulantQ. Alcohol, barbiturates, opioidsQ, benzodiazepines, chloral hydrate, paraldehyde, mandrax (melsedine), heroin (brown sugar), general anesthetics, sedative & hypnotics are CNS depressants. (However few may initially stimulate CNS). Hallucinogens (LSD = peyote = mescaline = phencyclidine), ecstasy, khat (catha edulis), cocaine and amphetamine are CNS stimulants (psychotropics).