Inhaling deodorant can be dangerous and even fatal. The harmful ingredients in deodorant include aluminum salts and ethyl alcohol. The main toxic substance in deodorant spray inhalation is butane, which is one of the hydrocarbons commonly used in propellants in sprayable products. Symptoms of deodorant poisoning include breathing difficulties, blackouts, heart rhythm changes, and cardiac arrest. If someone inhales deodorant, it is important to seek medical help right away. Do not make the person throw up unless poison control or a healthcare provider tells you to. If the person swallowed deodorant, give them water or milk right away, unless a provider tells you not to. Do not give water or milk if the person has symptoms that make it hard to swallow. Inhaling large quantities of aerosols, not just deodorants, can lead to a whole host of life-endangering scenarios. It is important to use deodorants as directed and in a well-ventilated area to avoid any potential risks.