I've done 3 weeks of 2.5mg with no side effects at all, and lost 13 pounds.... husband decided to start too and took my 4th dose from my pen. I did the extra dose yesterday by buying extra needles and hard twisting with my teeth (!) to number 1 and it went slack ..... but my question is today I'm hungry, and haven't been since I started - did I do the extra dose right do you think, or am I just paranoid?! I can't wait until next week and move up to the 5mg as don't like feeling hungry!