Medications used for co-morbidities
Thirty-six patients (14.4%) used methylphenidate (or other comparable
drugs) as a chronic medication for attention deficit disorder with or
without hyperactivity. Although not statistical significantly, the
percentage of patients who used methylphenidate increased parallel to
the duration of CSU (11% of patients with CSU <12 months,
15.6% of patients with CSU for 12-24 months and 20% of patients with
CSU > 24 months).