No. The presence of morphine and codeine on poppy seeds is very minute, you would need pounds of seeds to get any effect. While consumption of poppy seeds could cause a false positive for opiate use on a drug test a follow-up with GC/MS screening could likely distinguish between poppy seeds and actual opiate use. A person actually using opiates would have much higher levels of morphine, codeine or its metabolites in their urine than a person who ate a poppy seed bagel.