Initial symptoms of hydrochloric acid poisoning may include pain in the mouth and under the breastbone, or persistent drooling. Hoarseness and stridor (harsh sound in breathing caused by air passing through constricted air passages) may indicate injury to the larynx, epiglottis, or throat.

• Severe pain in the mouth
• Fever
• Difficulty with or inability to breathe due to swelling of the throat
• Severe pain in the throat
• Severe abdominal pain
• Vomiting blood (dark colored)
• Rapid drop in blood pressure

• Weakness
• Tightness in the chest
• Coughing
• Shortness of breath
• Coughing up blood
• Choking
• Bluish color to lips and fingernails
• Low blood pressure
• Rapid pulse
• Dizziness