According to the Centers for Disease Control and Prevention (“CDC”), no adverse health effects have been found in humans from low levels of exposure to ammonia. At higher levels of exposure, ammonia can irritate the throat, lungs, eyes, and skin causing coughing and burns. Using Stimsalts properly and in moderation, should not result in a person reaching high levels of exposure to ammonia. We recommend stopping use if any discomfort is felt and consulting a doctor if you have any concerns before use. Stimsalts have not been approved by the FDA.