7 yr old Night terror?

So my stepson is staying with us for winter break and since he’s been here it seems as if he keeps getting night terrors? My bf tries talking to him while he is having a night terror episode but he doesn’t respond and continues to cry and sometimes is inconsolable. I feel bad. I don’t want him to keep waking up every night crying, I want him to get a good nights sleep. Any idea on how to help him stop having them? I was thinking about the melatonin gummies for kids to help but I’m not sure? Advice please !