See this American Academy of Orthopedic Surgeons clinical decision tool for treatment options and disposition -<unk>  guidelines
Behavioral modification
Wrist splint with wrist in neutral position
NSAIDs (although not clearly effective)
Diuretics (if edema is significant contributor to patient's symptoms)
Carpal tunnel syndrome
Spinal cord lesion
Anterior interosseous neuropathy
Cervical radicular pain
Posterior interosseous neuropathy
Thoracic outlet syndrome
Cauda equina syndrome
Multiple Sclerosis 