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What causes back pain?
Most cases of back pain result from weakness of the back muscles caused by living a sedentary lifestyle. This includes the back pain associated with stress, when the back muscles often go into spasm. Back spasm also occurs if you have been doing something strenuous like gardening, or move suddenly after holding an awkward position. It is particularly common following a twisting motion, when many cases of a “pulled back” occur.The intervertebral disks - which act as shock absorbers - are subjected to different types of stress during the process of everyday living. While this stress may not result in back pain at the time the injury actually occurs, the repeated injuries add up. Bending over results in compression of the disk, and can cause it to bulge backwards towards the spinal canal and nerves. Twisting and bending together produces the greatest stress on intervertebral disks. Degeneration of the disks can give rise to chronic back pain as the muscles supporting the disks go into spasm. The degenerating disk can itself become inflamed and may cause mechanical pain.
The lower part of the back (the lumbar region) is the most vulnerable area of the back. This is largely due to the fact the lower part of the spine bears the entire weight of the upper body and is bent, twisted and flexed during everyday activities more than any other part of the spine.The actual back pain associated with damage to the supportive soft tissues (muscles, tendons and ligaments), and the intervertebral disks themselves, is caused by the inflammatory process.
Muscle relaxants
Muscle relaxants that address back pain are available as prescription and over-the-counter medications. Over-the-counter muscle relaxant medications include Robaxin® (methocarbamol), Robaxacet® (methocarbamol and acetaminophen) and Robaxisal® (methocarbamol and ASA). Prescription medications include Soma® (carisoprodol), Flexeril® (cyclobenzaprine) and Valium® (diazepam). Soma is typically prescribed on a short-term basis and may be habit-forming, particularly if used with alcohol or other drugs that affect the mind. Flexeril may be used on a longer term basis. This drug may impair mental and physical function and can lead to urinary retention in men with enlarged prostates.Valium is usually restricted to one to two weeks of use. Due to this drug’s habit-forming potential, and its propensity to alter the sleep cycle, it is not prescribed for the long-term. Since valium is a depressant, it can worsen the depression often associated with chronic back pain.