Can promethazine DM syrup cause me to fail a drug test?

Promethazine DM syrup contains promethazine and dextromethorphan, neither of which are typically tested for in standard drug tests. However, some specialized tests may detect these substances, especially if they are looking for specific medications. If you are concerned about a drug test, it's best to inform the testing entity about any medications you are taking. Always consult with a healthcare professional for advice tailored to your situation.