Dexmethylphenidate has a 4â6 hour duration of effect (a long-acting formulation, Focalin XR, which spans 12 hours is also available and has been shown to be as effective as DL (dextro-, levo-)-TMP (threo-methylphenidate) XR (extended release) (Concerta, Ritalin LA), with flexible dosing and good tolerability.
1 Degenerative disc disease in the neck (cervical spondylosis) can cause local neck pain or radiating pain from disc herniation, causing pinching of nerves (cervical radiculopathy). 2  Abnormal conditions involving the spinal cord, heart, lungs, and some abdominal organs also can cause neck and shoulder pain. This can also cause muscle spasms in the neck and shoulder areas. 2  Tendonitis: The tendons connect the muscles to the bones. 3  With strain, the tendons can become swollen and cause pain. 4  This is also referred to as tendinitis. 5  Gallbladder disease: This can cause a pain referred to the right shoulder.
The causes of neck and shoulder pain and stiffness are many and can range from silly reasons like sleeping in a wrong posture to serious ones like arthritis and meningitis which can leave us with a sore and painful neck for several days. Some of the common causes of neck pain are: