What can make you blood test slightly for opiates?

Hydrocodone ( Vicodin) temperament do it; also codeine, morphine, demerol, opiate based ( RX) cough syrups, etc Heroin is only one connected with many opiate substances. If the individuality tested positive for an opiate, obviously he had availed himself of an opiate. A real opiate result cannot be found ( for example) after ingesting over existent as innocuous as chocolate ice cream, believe me!