local actor = db.actor
local item_name = sect:section()
if item_name=="conserva" then
if not xr_conditions.actor_has_item(actor, npc, {"wpn_knife"}) then
give_object_to_actor("conserva")
news_manager.send_tip(db.actor, "Нужно открыть консервную банку ножом.", nil, "none_info_pda", nil, nil)
end
if xr_conditions.actor_has_item(actor, npc, {"wpn_knife"}) then
действие
end
end

function give_object_to_actor(obj,count)       
          if count==nil then count=1 end       
          for i=1, count do       
              alife():create(obj,db.actor:position(),db.actor:level_vertex_id(),db.actor:game_vertex_id(),db.actor:id())       
          end       
end

function start_timer()  
    local iTimer = time_global() + items_table[used_item]    
    local function check_timer()
          return time_global() > iTimer
    end
    level.add_call(check_timer, action_timer)
end

local items_table = {     
       ["medkit"] = 8000,
       ["medkit_army"] = 8000,
       ["medkit_scientic"] = 8000,
       ["antirad"] = 8500,       
      }

if items_table[obj] then -- Если предмет obj есть в таблице
...
end

["Название секции предмета"] = миллисекунды для таймера,

local iTimer = time_global() + items_table[used_item]

local items_table = {"medkit", "medkit_army", "medkit_scientic", "antirad"}
local two_and_more = false
local one_item = false
for k,v in pairs (items_table) do
   if db.actor:object(v) then
      if one_item then
         two_and_more = true
      else
         one_item = true
      end
   end
return two_and_more

local items_table = {     
       ["medkit"] = {время, здоровье, радиация},
      ...      
      }
...
local iTimer = time_global() + items_table[used_item][1]
local iHealth = items_table[used_item][2]
local iRad = items_table[used_item][3]