hello, i went for a medical today for a new job. i took some solpadeine for a headache the other day.i had a drug test today and tested positive for opiates.opiates is a form of codiene which solpadeine has codiene, and i think herion has codiene in it coz i googled it,the doctor now send my urine to the lab as he wants to check me urine for drugs,in the lab can you tell the difference between salopadine and herion even if they have codiene i them please help