Gaby,
Not that I know of in particularly. A lot of kids can wind up in the evening. One thing that I have seen work is setting a routine for bedtime:
-turn lights down in the house
-TV and radio are shut-off
-consistently taking a bath with Epsom Salt (1 to 2 cups in bath water) every evening.
-To bed at a consistent time every night.
The GABA may be helpful. Also, can try some Chamomile herbal for kids. There is a company called “Herbs for Kids” that sells a product called ‘Chamomile Calm’ which i have seen help.
Dr. Woeller