Methotrexate in the Treatment of Chronic Idiopathic Urticaria

"Methotrexate (Novatrex ®) tablets 2.5 mg methotrexate 0.2 mg/kg/week as a single dose, orally for 8 weeks.~After 8 weeks, if the treatment is still not efficient, the dose will be increased to 0.25 mg/kg/week and continued until W18.~For anti-H1 treatment, the same molecules with the same dosage than before the recruitment will be continued, and methotrexate will be added in this group."

"Placebo: 0.2 mg / kg / week as a single dose, orally for 8 weeks. After eight weeks, if the patient is still very embarrassed, the dose is increased to 0.25 mg / kg / week in a weekly dose.~For anti-H1 treatment, the same molecules with the same dosage than before the recruitment will be continued, and the placebo of methotrexate will be added in this group."