Muscle relaxer are drugs that eases pain, swelling, stiffness or any type of discomfort due to sprains, muscle injuries, strains and muscle spasms. But they do not really heal the defects but it can help in relieving the pain and relaxing the muscles. Over the counter muscle relaxants are quite convenient than prescribed drugs since you can easily get it anytime you want. The difference with prescribed drugs is that they are more potent thus they need to be carefully monitored by a doctor unlike muscle relaxants over the counter which you can easily buy without your doctors prescription. So that if over the counter relaxers do not work then it is time to go to your doctor for more powerful medications.