You can get him to a doctor.
This can be dangerous, and if you try to manage this, you can become responsible for a very bad outcome.
A doctor can prescribe a medication such as clonipine, a non-benzo, that is not addicting and can allevaite symptoms.
Some people need to be admitted to the hospital for withdrawal, depending on the situation.
Withdrawal unsupervised can cause seizures and other problems.
OFten a controlled taper, by the doctor, is needed.
I would take him to the ER if he can not see a doctor now.
OK, so that is an initial answer….
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