Brief Answer: Hydrocodone and oxycodone have same chemical structure Detailed Answer: Hi You do not need to worry as tab. percocet and lortab contains opioid derivative which are almost same in chemical structure. Above all, you took only one tablet. The half-life of hydrocodone (lortab) is 3.8 hours, which means half of drug, will be removed from your body in 4 hour, and then you can imagine what will happen in 24 hour. Take care and wish you good health.