The difference between hyoscine and atropine is that hyoscine:
ATROPINE HYOSCINE CNS EFFECT : AT LOW DOSE : EXCITATION(MILD) DEPRESSANT AT HIGHT DOSE : EXCITATION AND HALLUCINATION EXCITATION AND HALLUCINATION DURATION LONGER SHOER ANTICHOLINERGIC PROPEY MORE POTENT ON HEA, BRONCHIAL MUSCLES AND INTESTINE MORE POTENT ON EYE AND SECRETORY GLANDS