^ good opiate experiences escalates usage pretty quickly for the wrong reasons, so be careful. you'll want to do it again, and again, and again, etc. I find opiates harder to resist than any other drug I've done and it all started with Hydro. 25 mgs of Hydro will give you a high you will never forget and you will experience the power of a real opiate high, no heroin rush, but definitely extreme euphoria. You aren't even close to the amount you need to find what your looking for. You'd probably need 15 mgs to get that "awesome mood" feeling that I used to love, but if you are physically a "lillady" and dont weigh much, I wouldn't go over 20 mgs until you've tested the waters. Up your doses by 5 mgs (2.5 if you want) if you feel you didn't get enough. I have never used a 2.5 mg half pill of hydro in my life, but weight does play a factor (I weighed 130 lbs when I started).
Oh, if you start to freak out from being too drowsy (start nodding), get up and start walking around the house, turn the music up, call somebody just to have a conversation, and so on. Just stay awake and enjoy! :D