Making a potion class (change values two objects down)

Hello i was just wondering what is the generaly good way to do a potion in a game cause i feel what i got right now is not that good. This doesnt really work with potions over time which i could go around by adding effects over time to player but I was just wondering if this is the right way to do it.

Example :

 class Player
 {
           Inventory inventory;
           Health health;
 }
 class Inventory
 {
           Item[] bag = new item[30];
           bag[0] = new Potion();
 }
 abstract class Item { ... }
 class Potion : Item
 {
           public void Use()
          {
           GameObject.Find("Player").Player.health.RestoreHealth(value);
          }
 }