Since depression is a well-known symptom of MS, I was shocked to learn at the 2014 ACTRIMS-ECTRIMS Meeting that more people with MS have an anxiety disorder than have depression. A study of 7786 adults with MS showed that 54.1% had “excessive symptoms of anxiety,” while 46.9% had “excessive symptoms of depression.”
It turns out that the prevalence of anxiety disorders in people with MS is roughly three times the prevalence of these disorders in the general population. More specifically, statistics show that among people with MS:
- 18.6% have general anxiety disorder at any time (compared to 5.1% of people in the general population)
- 10.0% have panic disorder (vs. 3.5% in general population)
- 8.6% have obsessive compulsive disorder (OCD) (vs. 2.5% in the general population)
- Social anxiety is also higher in people with MS than the general population.
In addition, more women with relapsing-remitting MS (RRMS) than men with RRMS are affected by anxiety disorders. People with secondary progressive MS were more likely to have symptoms of anxiety than those with other disease types.
Anxiety has received only a fraction of the attention depression has received as a disorder overall. However, it has been shown that anxiety in combination with depression, rather than anxiety or depression alone, are associated with increased thoughts of self-harm and more social problems. Despite the high prevalence in people with MS, as well as the potential risks when anxiety is combined with depression, the treatment or management of anxiety in MS has not been specifically studied. In my opinion, this is a problem, since MS symptoms can be made worse by the side effects of antianxiety drugs, which include: drowsiness and lack of energy, clumsiness, impaired thinking and memory loss, and slurred speech.
Another challenging factor is the difficulty faced by neurologists around diagnosing this disorder in their patients. There are a couple of reasons for this. People who are newly diagnosed with MS often exhibit symptoms of anxiety that may be transitory as they adjust to their diagnosis. More challenging is the overlap of symptoms between anxiety and MS. All of these extremely common MS symptoms are also symptoms of anxiety: pain, tremors, “buzzing” in their limbs, numbness, problems swallowing, tightness around the rib cage, sexual dysfunction and weak arms and legs.
What I would like to emphasize for anyone who is experiencing symptoms of an anxiety disorder or depression is that it is NOT your fault. People with these disorders can no more “pull themselves out of it” by “counting their blessings” or “looking on the bright side” than people in wheelchairs can get up and walk at will. If you are feeling any of the symptoms of these disorders, please seek professional help, preferably from a psychiatrist or other mental health professional who has experience treating people with MS.
Note: One very specific form of anxiety that was mentioned in the session was injection phobia, brought about when people have anxiety around self-injecting their MS disease modifying therapies. There has been some success in alleviating this using cognitive behavioral therapy. It is important to address injection phobia as soon as possible, as this reluctance to self-inject can lead to problems with adherence.