Is he on any other medications that you know of?
Now we do not know if he is taking the tablets all at once, but if so, we can also not be sure if it is just 30 tablets. Inform his family about this and ask if he had been acting strangely at home.
I would advise you to not leave his side and try seeking medical attention as soon as possible(whether or not he had taken the tablets)
Next Steps
watch out for the following symptoms
Drowsiness,
Shallow breathing,
Impaired motor function,
Dizziness,
Impaired balance,
Muscle weakness,
Fainting,
Coma,
If you find that he is developing any of the symptoms, rush him asap to any emergency.
Health Tips
U need not worry, 30mg of restyl is not a fatal dose per se. But we do not know for sure if he has just 30 tablets or has he had it with water or any other substances. So its better to be safe rather than leave it as such.