sentences:  Signs of toxicity in calves, sheep, rats and mice, at low doses, included agitation, respiratory difficulty, and loss of motor control; symptoms appeared within 2–3 minutes of injection, and disappeared within 10 minutes.Doses large enough to produce collapse also caused an increase in heart and respiration rates, as well as tremor, with significant convulsions evident in mice and rats, but not in cattle or sheep.In cases where death seemed imminent, the poisoning in sheep could be counteracted by the i.v.