How many vikes did you take? I would say 15mg for percs/oxy for a first time experience, but you could dose higher and be safe, but you may feel sick. There is no point in building tolerance though, so start as low as you can. In theory if you get high off of 15mg norco, you'd only need 10mg oxy, 20mg norco, 15mg oxy, 30 mg norco around 20mg oxy, it's not an exact science, but start low and find you're sweet spot. It'd keep you safe and you'll be able to enjoy oxy for longer. Or just flush them/sell them.... I'm trying to quit opiates at the moment and it's better not to start at all. I don't regret it at all, but I should and opiates are a waste of time. Like a really hot woman that is just a cock tease. tripsitme.com and erowid.org are great resources for dosage info. Look into CWE if you end up making a habit of opes. And you're body weight really won't effect dosage for opiates, I'm an average guy but I can handle more then most people, which sucks.