- No, NBOMe compounds and other psychedelic drugs are not suitable for people with severe mental disorders. It is one thing to have a diagnosis but another thing (or rather a much worse thing) to be mentally unstable. Tripping confuses what is real and what is fantasy / dream. You need to be able to handle that.
- Being in jail could easily lead to a bad/difficult trip even for people who are not mentally unstable. So pardon me for saying so but it is not extremely surprising to hear that she didn't take it well at all, to say the least. I guess you didn't realize what you did there, but psychedelics are powerful substances and NBOMe compounds doubly so.. please be a lot more careful about who you give them to. Even besides people with mental problems, your friends and family may not find it so easy to deal with unless they are more prepared and experienced.
Read more about what are called set and setting and make sure those are always in order not only for yourself but anyone else you consider introducing to these drugs. And if you don't know exactly what you are doing, NBOMe compounds are terrible to be handling. They can be physically dangerous and psychologically dramatically strong. It would be safer if you had certain other psychedelics to 'play' with.
- The above kind of answers the question about bad trips. Bad preparation, bad patience, insufficient safety and trust and peace for all trippers, insufficient experience, those kinds of things can lead to bad trips.
- Taking anything on top of NBOMe compounds may complicate things and it should be done as last resort and not casually, and not so that you can take NBOMe's casually and just stop the trip whenever you feel like it. It is serious.
Benzo's can dull a trip and calm a person. It can also offer physical relaxation to counter the strain.
Anti-psychotics should be able to stop a trip more 'completely' and abruptly but I do not know if it may be dangerous in other ways.
People may have serious reactions to their peripheral nervous system and heart and blood vessels when taking a drug like this. There are proposed medications to remedy this, but it is very new territory and I would not recommend you to just experiment with that.
Prevent rather than remedy. These are not toys. You can get people hurt, you know that now from experience. Learn from this NOW if you care at all about yourself and other people.