(ammonia), a clear, colorless volatile liquid with a sharp characteristic odor - 10% ammonia solution in water. It easily penetrates into the tissues, providing a stimulating effect on the central nervous system (breathing becomes faster, blood pressure rises). In high concentrations can cause respiratory arrest. Apply to remove the patient from fainting, for which carefully bring a small piece of cotton wool moistened with ammonia, to the nasal openings. Inhalation of it, acting on the receptors of the upper respiratory tract (the end of the trigeminal nerve), has a stimulating effect on the respiratory center (stimulates breathing). Apply inside (2-3 drops) on a half glass of water for acute alcohol poisoning. The solution also has an antimicrobial effect and cleans the skin well.