Not Medical Advice:
A capsule shaped white pill with the imprint WPI on the front, and 39 68 on the back of it is 500mg of Chlorzoxazone (made by Watson Pharmaceuticals, Inc.).
Chlorzoxazone is a skeletal muscle relaxant that is used to treat muscle spasm.
There is a low risk of abuse with this drug.
This prescription-only medication is not proven to be a risk to an unborn fetus, but should be used only under a doctor's supervision.
WebMD offers tips and more information about skeletal muscle relaxants.