20mg on your first time taking an opiate and you didn't feel anything? That's really weird. I mean like, really fucking weird. I remember when I first started taking opiates (hydrocodone was the one that took my opiate cherry

) and 10mg would have me on cloud 9. It knocked me on my ass. I can't imagine taking 20mg my first time...but hydrocodone is weaker than most other opiates imo. But still. For an opiate-naive person, that should've given you at least a little bit of euphoria. Maybe you just naturally have a higher tolerance for stuff? Try this:
A.) Take one benadryl an hour and a half before your hydro. Or better yet, if you can get your hands on some promethazine, that'd be even better. Wash the benadryl/promethazine (choose one of the two. don't take both, please lol) down with a HUGE glass of white grapefruit juice. The grapefruit juice works by inhibiting certain enzymes in the stomach, which affects the metabolizing of the hydrocodone. You could also try taking two tums or something with antacid in it half an hour before you take the hydro. Basically, they lower the PH of the stomach which allows more of the opiate to be absorbed into the blood. Then, pop 20mgs again and see if that helps. If you're not feeling sick, maybe 30mgs? It's your call, I just don't want you to get sick again. That always blows. Try it on a somewhat empty stomach. Not completely empty, maybe just a piece of bread or something small like that.
If that doesn't work, then I'm not sure what to tell you. Maybe try a different opiate like Oxycodone. But just a little reminder; Oxycodone is much stronger than Hydrocodone. I wouldn't recommend going over 15mg on your first time with them. First time I took Oxy's I took 20mg and I was puking all night long. Not a fun time. So that's a whole other forum in itself lol.
But the ONE thing I can't express to you enough...stay safe. If you're not getting any high from 30mg of hydrocodone, more than likely they're just not for you. Don't keep taking more, hoping to catch a high. That's an overdose waiting to happen. Opiates aren't meant for everyone. And don't get mad if you're one of those people, just stick to smoking weed or whatever drug of your choice

Just be safe while doing so!
If you have any questions, feel free to ask me! Xoxo