Methotrexate
"I have been in methotrexate for 6 weeks now. So far, itchiness has been reduced significantly; lesions in my lower leg have dried up (light brown now); other lesions appear to be clearing up though slowly. Side effects to me are nausea, feeling giddy and occasional headache though not severe. 

May I ask those who are in the same medication: how long did it take for all lesions to be cleared? about 70% of my body has psoriasis. Thank you.   ."