<unk>  (oleoresin capsicum)<unk>  is a commonly used riot-control and violence suppressive agent.  It was first used by Federal Bureau of Investigation personnel in the US in 1973. The majority of the uses do not cause life threatening clinical effects. Commonly encountered effects include conjunctivitis, blepharospasm, and self induced corneal abrasions. Early decontamination minimizes the irritant effects.
Oleoresin capsicum (OC) is the main active ingredient and is extracted from the genus of the plant Capsicum annuum.  The five capsaicinoids include:
Capsaicin and dihydrocapsaicin constitute 80-90% of<unk> 
A Patient with excited delirium, placed in physical restraint (handcuffed in prone position) with a history of chronic bronchitis experienced asphyxia due to bronchospasm
Pepper spray
Asthma exacerbation
Magic mouthwash
Caustic keratoconjunctivitis
Tick removal
Blister chemical agents 
Loa loa
Lewisite 