01-05-2009, 01:29 AM
My guess on the codeine would be that its a muscle relaxer, and since the legs are jumping because of erratic impulses sent to the leg muscles, the codeine suppresses that for a while. My dad had back surgery and shoulder surgery a couple of years ago, and they gave him the same thing, explaining that when the body heals, the muscles naturally spasm, which unfortunately causes damage to the very muscles needing to heal. The codeine keeps this from happening by keeping the muscles relaxed until they have a chance to mend.
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