Confidence votes 81. It cost about $500-$800 worth a year's supply of diapers for the first year.The next years may or may not cost more, the same, or less.
Cyclobenzaprine, sold under the brand name Flexeril among others, is a muscle relaxer medication used to relieve skeletal muscle spasms and associated pain in acute musculoskeletal conditions. It is the best-studied drug for this application. It has also been used off-label for fibromyalgia treatment.
There are a number of side effects that may accompany Flexeril, some of which are muscle weakness, blurred vision, drowsiness and loss of appetite. You should contact your doctor immediately if you experience chest pain, numbness, confusion or seizures.