How Safe Is Taking Metothaxrate For Psoriasis?

Dear Sir/ Madam I am siva age 23, I went for Liver function, blood and urine test. All were normal except indirect bilurubin 2 and direct bilurubin 1.2, total .B 3.2. urine test nill albumin. All were normal and dont feel drowsy or fever or any thing I m absolutely healthy. But I had psoriasis I need to take metothaxrate can I take it now? if not when should I go for tht??