test.rb

require 'json'

json = JSON.parse'{
    "type": "item",
    "version": "1.7.20",
    "data":{
      "1002":{
          "generic_name": "ACETAMINOPHEN",
          "brand_name": "Tylenol",
          "film_coated": true,
          "dosage": [
                      200,
                      400,
                      500,
                      1000
          ],
          "purpose": "pain reliever/fever reducer",
          "uses": [
                    "headache",
                    "muscular aches",
                    "backache",
                    "minor pain of arthritis",
                    "the common cold",
                    "toothache",
                    "premenstrual and menstrual cramps",
                    "temporarily reduces fever"
                    
          ],
          "image": {
            "full": "tylenol.png",
            "small": "tylenol_small.png",
            "x":0,
            "y":0,
            "w":100,
            "h":100
          },
          "tags": [
            "pain",
            "OTC",
            "cramps"
          ],
          "purpose": "treat motion sickness",
          "uses": [
                    "vomiting",
                    "motion sickness",
                    "nausea"
                    
          ],
          "image": {
            "full": "dramamine.png",
            "small": "dramamine_small.png",
            "x":0,
            "y":0,
            "w":250,
            "h":250
          }
        },
          "1003":{
            "generic_name": "MECLIZINE",
            "brand_name": "Dramamine",
            "film_coated": false,
            "dosage": [
                        25,
                        50
            ],
            "purpose": "treat motion sicknessx",
            "uses": [
                      "vomiting",
                      "motion sickness",
                      "nausea"
                      
            ],
            "image": {
              "full": "dramamine.png",
              "small": "dramamine_small.png",
              "x":0,
              "y":0,
              "w":250,
              "h":250
            },
            "tags": [
              "motion sickness",
              "OTC",
              "vertigo"
            ]
          }
        },
        "meta": {
          "total_count": 2,
          "call_type": "GET"
        }
      }'





json['data'].each do |x|
  x.each do |y|
    puts y['generic_name']
  end
end