hi, and welcome,you need to get some good nutrients back in you, not only to gain weight, but for your health, you need proteins, you could take the protein health drinks/shakes, also fresh fruit and veg, eating them raw is best, sugary stuff isnt much help, and not good for you, take a good vitamin supplement and some calcium/magnesium/zinc, b vitamins are also needed, these are what your body is depleted in with taking drug, i wish you well, take care, sudie