Benzo's are anti-anxiety meds. Benzo is short for benzodiazepines. They are a class of sedative. There are also muscle relaxants like carisoprodol (Soma) that can help your muscles to relax. You should not take them for long and not when you need to use your muscles in a strenuous way.

A physio may not have all the skills to manipulate your back and neck into proper position.