Inventory wont open to give steiner his medicine .done every thing correct .been sent saved game but dont work.this game is full of glitches

I guess you already know how to open the inventory by now, so it's not a question of doing that wrong. Is it possible that you have to do some action other than normal opening of inventory in order to give Steiner the medicine? Maybe just talking to him automatically gives it to him?

If the saved game doesn't work, the Hints forum is a better place to ask. Maybe the save only works with some versions of the game -- or maybe it has to be applied in a specific way in order to work.

I don't own the game. I'm not fond of "sequels" where they sacrifice the gameplay and stability of the original game(s) in the name of high resolution graphics and compatibility with consoles. Since I lack first hand experience with the game, someone else may have better suggestions.

A lot of suggestions, advice, and offers to help were given in a thread in Hints, which can be found here.

And someone in that thread is still willing to try to help you with your saved game.