I know you scared that it might a fake herbal medicine. I have a solution for checking the certificated from Thailand Ministry of Public Health.
Let’s Go to http://www2.fda.moph.go.th/consumer/drug/dcenter.asp – This is Thailand Ministry of Public Health Web site.
1. Choose Menu (No.1)
2. Choose “G” Alphabet (No.2)
3. Fill 481/53 into a box
You will see Grakcu is up on the Web Site ^^