Respiratory centre depression can be caused by all except:
Ref:Parikh's Textbook of Medical Jurisprudence 6/e p10,57 *Strychnine stimulates the respiratory centre whereas other drugs given the option like opioids, barbiturates and gelsemium cause respiratory depression. *Gelsemium has been traditionally been used to treat pain and respiratory ailments. Toxic symptoms include giddiness, weakness, ptosis, dilated pupils and respiratory depression.
Central Nervous system
Opium
Strychnine
Barbiturates
Gelsemium
Strychnine