<div class="field">
      <label class="" for="limitation">Limitions?</label>
      <div class="radio-content">
              <input id="limitation1" type="radio" class="limitSelected" name="limitation[]" value="1" />
              <input id="limitation" type="radio" class="limitSelected" name="limitation[]" value="0" />
      </div>
      <div class="limitation_points">
            <select id="pillers" name="pillers[]">
                <option value="0">0</option>
                <option value="1">1</option>
            </select>
      </div>
</div>
<div class="field">
      <label class="" for="limitation">Limitions?</label>
      <div class="radio-content">
              <input id="limitation1" type="radio" class="limitSelected" name="limitation[]" value="1" />
              <input id="limitation" type="radio" class="limitSelected" name="limitation[]" value="0" />
      </div>
      <div class="limitation_points">
            <select id="pillers" name="pillers[]">
                <option value="0">0</option>
                <option value="1">1</option>
            </select>
      </div>
</div>

    jQuery(document).ready(function($) {
      $('.limitation_points').hide();
      $('.field .limitSelected').each(function(){
        $(this).change(function() {
          var selected = $(this).val();
             if(selected == '1') {
               alert('yes');
               $(this).closest('.field').find('.limitation_points').fadeIn(200);
           }  else {
             $(this).closest('.field').find('.limitation_points').fadeOut(200);
             alert('no');
           }
        });
      });
    });