16 yo daughter charged for having 1 hydrocodene pill in her pocession

If it was one pill, the offense would likely be charged as a State Jail Felony. If that be the case, yes, it is a felony. You need to hire a competent criminal defense attorney. I'm board certified; feel free to contact me. Or, you can shop around based on your location. The answer to whether it will remain on her record depends entirely on how the case is resolved. If it ends up as a conviction, it will always be on her record. That, and she would be a felon. The collateral consequences that adhere to a felony conviction can be pretty severe. So, if at all possible, hire the best attorney for her you can.  Hope this helps.   Rick