Indication of preanaesthtic agents administration:
1- Reduce the amount of the general anaesthetic
2- Prolong the duration of anaesthesia.
3- Calm the patient.
4- Reduce the salivary and bronchial secretions.
5- Reduce gastric and intestinal mobility and prevent vomiting.
6- Smooth recovery.
7- Block the vago-vagal reflex, thus preventing cardiac slowing or arrest (against shock).
8- Together with local and regional analgesia / helps to restrain the patient during operation, i.e. Rumenotomy in cattle.
9- Produce muscular relaxation.