Is robaxin prn, or do i need to take it regularly for it to work?

Robaxin: While it can be used prn - it does work much better when you achieve a blood level and maintain it. Also - generally the sedation side effects wear off with regular use. I would recommend it to be used regularly and once the painful condition seems under control you can certainly back off on dosing. Good luck

It depends: Ir depends on the type of muscle problems, but most of the uses can be "as needed" as long as it is not more frequently than prescribed