Symptoms are salivation, vomiting, anorexia and depression. Excessive exposure can cause nausea, headache, muscle weakness, salivation, shortness of breath and seizures. Other symptoms include increased sweating, salivation, bronchial secretions along with miosis (constricted pupils). Initial symptoms include vomiting, salivation, and discoloration of the tongue and gums. Signs of bloat include gastric distress (stomach pain), futile attempts at vomiting, and increased salivation. Birds affected by strychnine poisoning exhibit wing droop, salivation, tremors, muscle tenseness, and convulsions. Abdominal cramping, chills, increased sweating, salivation and difficulty breathing are also common. The initial symptoms of humans are nausea, dizziness, salivation, headache, sweating, lacrimation, and rhinorrhea. Overdosing may result in seizures, falling, salivation, constipation, and muscle twitching. Induction causes little coughing however produces increased salivation. Marked hyperhidrosis and excessive salivation were evident. Soon after, the victim will have difficulty breathing and will experience nausea and salivation. Pavlov called the dogs' anticipatory salivation "psychic secretion". Common complaints include pain, scars, excessive salivation and damage to tooth enamel. Excessive salivation and grinding of the teeth also are observed.