Increasing awareness of the FEI Prohibited Substances List and the Clean Sport movement has meant that great care has to be taken in developing an effective calmer for use in competition. 
Competition Calm contains just liquid extracts of Withania (Withania somnifera) and Wild Lettuce (Lactuca virosa), both made to strength of 1:2

Competition Calm is particularly useful in high stress situations that can occur in both training and competition. 
It is also helpful for horses in new surroundings where strange objects or unusual noises can cause alarm.

The suggested dose is:
10-20 mL twice daily for horse
5-10 mL twice daily for ponies
but depending on your horse one or two doses before a stress event may be sufficient.

Competition Calm does not contain any ingredients recognized to contravene the FEI rules regarding prohibited substances at time of printing.