I got it prescribed Thursday for minor pneumonia. I went back to the ER this Tuesday and it is now Friday night. I took my dose. My question is I got it late that Thursday daytime and it says take one every 12 hours for 10 days. So Saturday tomorrow would be my last day. I took one that day it would have left me with an extra and Wednesday night my tummy was upset and I didn't take it that night. I am wondering if since that would leave me with two days left if i can stop it. Because when I went back to the ER they said my X-ray looked good I went there for a breathing treatment. Anyway I am only 20 so can I stop taking it because that would make 11 days since I didn't take the second one on both those days even though Saturday would be my last day.