hyoscine (scopolamine), and hyoscyamine, have anticholinergic properties. The symptoms of belladonna poisoning include dilated pupils, sensitivity to light, blurred vision , tachycardia , loss of balance , staggering, headache, rash , flushing, dry mouth and throat, slurred speech, urinary retention , constipation , confusion , hallucinations , delirium, and convulsions. [10]