How sick? It is some usual winter sickness? If yes, I recommend the "Bérescsepp" drops. It is a Hungarian invention, but it is popular and famous worldwide. It is a very effective immunity booster. You need to drink 20 drops at morning and 20 drops at evening dilued with some liquid (water, juice, etc...) excluding milk. Here is how does it look:

I recommend it to you the 100 ml packaging, because of cost efficiency.

P.S. Btw...it is also very good to prevent the sickness, not just for treat.