TETRAMETHYL AMMONIUM CHLORIDE Inhalation: Causes irritation to the respiratory tract. Symptoms may include coughing, shortness of breath. Ingestion: May be fatal if swallowed. Symptoms may include dizziness, nausea and shortness of breath (nicotine-like symptoms). Acts as a ganglionic (nerve cells) blocking agent and vasodilator (dilates blood vessels). Skin Contact: Causes irritation to skin. Symptoms include redness, itching, and pain. Eye Contact: Causes irritation, redness, and pain.