Pepper (oleoresin capsicum) spray 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 pepper spray
Death Associated with Pepper Spray
- Painful burning sensation on skin
- Involuntary eye closure
- Decreased hand eye coordination
- Conjunctival injection
- Shortness of Breath
- Throat pain
- Blister chemical agents (Vesicants)
- Pulmonary chemical agents
- Incendiary agents
- Cyanide chemical weapon agents
- Hydrocyanic acid
- Prussic acid
- Nerve Agents
Evaluation is focused on the irritated bodily area which is usually the eyes, throat, and skin, and lungs.
- Assess for corneal abrasions (approx 7% incidence) and blepharitis
- Patients may have decreased corneal sensation from 10 min after exposure to up to 1-2 hours and should be instructed to wear sunglasses or eyeware for protection.
- Patients with underlying respiratory disease such as COPD and asthma may experience shortness of breath or wheezing. To evaluation for Chemical pneumonitis a chest X-ray may be useful.
- Bronchoconstriction can be improved with inhaled beta-2 agonists such s albuterol
- Nasal and pharyngeal erythema and irritation will resolve quickly after decontamination
- Laryngospasm lasting up to 45 seconds has been described
- Patients may experience transient dermatitis and allodynia which will self resolve
Treatment should be consistent with any specific injuries that are identified. Injuries that require treatment are generally only:
- Evaluate and treat any corneal abrasions
- Patients with evidence of wheezing and bronchospasm may benefit from albuterol therapy
- Most pharyngitis and mucosal irritation will self resolve
- Cool water exposure to any irritated or erythematous areas may help reduce cutaneous pain.
Patients can generally be discharged. Only those with severe respiratory complaints may require a longer observation period in the Emergency Department
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- Kennedy WR, Vanhove GF, Lu SP, et al. A randomized, controlled, open-label study of the long-term effects of NGX-4010, a high-concentration capsaicin patch, on epidermal nerve fiber density and sensory function in healthy volunteers. J Pain 2010;11:579-87.