These are the items that you could only use once.

Item:                      Description:
Antivenom                  cures poisoning
Apple                      An apple
Attack potion              Raises ATT for awhile
Banana                     A banana
Barley tea                 tea
Cheese                     cheese
Dim Sum Set                Some dim sum
Elixer                     restores HP
Frankfurther               local fav
Grapes                     grapes
Grape Juice                grape juice
Green Tea                  tea
Ham & Eggs                 food
High Potion                resores some HP
Ice cream                  ice cream
Library card               Use to get back to the first castle
Luck Potion                Raises luck for awhile
Lunch A                    Lunch set
Manna Prism                restores all MP
Meal ticket                food ticket
Miso soup                  soup
morning set                breakfast
Natou                      tofu
Peanuts                    peanuts
Pizza                      pizza
Pork Bun                   Food
Pot Roast                  pot roast
potion                     raises HP
Ramen                      noodles
Red Bean Bun               food
Resist Dark                strong against dark
Resist Fire                strong against fire
Resist Holy                strong against holy
Resist Ice                 strong against ice
Resist Stone               strong against stone
Resist Thunder             strong againt thunder
Shield Potion              Raises DEf for awhile
Shiitake                   mushroom
Shortcake                  cake
Sirloin                    stake
Smart Potion               Raises INT for awhile
Strawberry                 berries
Strength Potion            Raises STR for awhile
Sushi                      food
Tart                       fruit tart
Toadstool                  poisoning mushrrom
Turkey                     food
Uncurse                    uncurse a curse
Life Apple                 (familiar use only)heals yourself
*most food items are healing items

Item:                       Descriptions:
Ankh Of Life                Improves heal item powers
Aquamarine                  a ring that you can sell
Bloodstone                  ability to heal blood
Covenant stone              STR+5
Daimond                     a ring that you can sell
Duplicater                  Duplicate items
Garnet                      a ring that you can sell
Gauntlet                    ATT+5
Gold Ring                   wear it in the clock tower
Heart Broach                reduces heart usage
Kings stone                 Gemstone buckle
Lapis Lazuli                jewel that brings luck
Medal                       DEF&ATT+1
Moonstone                   improves status after sunset
Mystic Pendent              increases mp restoring rate
Nauglamir                   DEF+15
Necklace Of J               DEF+5
Opal                        a ring you can sell
Ring Of Arcana              increases rare items appearences
Ring of Ares                strenght of 24 men
Ring of Feanor              increases strength
Ring of Pales               ring with holy powers
Ring of varda               A golden ring
Secret boots                get taller
Silver ring                 where it in the clock tower
Staurolite                  strengthens power of cross
Sunstone                    improves staus after sunrise
Talisman                    mat absorbes the damage taken
Turquoise                   a ring that you can sell
Zircon                      a ring that you can sell