For how long do you usually prescribe an nsaid(such as etoricoxib 60 once daily ) and a low dose muscle relaxer (methocarbamol 380mg+acetaminophen 300) for back pain (inflammation)?is 14 days a norm or is a month normal(my doc prescribed for 1month?

If this is a recent injury or strain, the duration of treatment with medicine could range from 5-10 days. If the problem becomes longer, the addition of physical therapy can help reduce your need to take medication on a regular basis and restore the muscle and skeletal system back to normal function. You can discuss this with your doctor to arrange a good balance of both.