This is amphetamine psychosis.
This is a psychotic disorder that is caused by heavy overuse of stimulants, commonly amphetamines but others can cause it.
Amp psychosis is characterized by symptoms indentical to those seen during other psychotic breaks like: paranoia, loss of sense of reality, delusional states, loss of short term memory and violent behaviour.
It can continue for months after drug use has stopped or last only a short period of time. Equally it can lead to longterm mental health problems.
The only thing YOU can safely do in that situation is inform the aurthorities, sign the hospital forms and keep well out of the way until the cops arrive.
You cant reason with someone in this condition because to all intents and purposes they are insane and dangerous.
Yes a mix of benzos and anti-psych drugs will calm them down and/or knock them out but a person in this state will be very paranoid and wont take kindly to being drugged and could very easily become violent.
If you need to know anything more specific then feel free to ask and ill answer if I can or goggle stimulant induced psychosis and there will be thousands of pages of information.
I hope your friend comes out of it soon and without any lasting issues.