Will Doxycycline Hyclate Cause A False Positive In A Urine Test?


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Arianna Vaccaro answered
It depends on the type of drug test you are having, as those administering it may be looking for different substances. That said, in some cases Doxycycline Hyclate can cause a false positive result in a urine sample. It is unlikely though if it will provide positive results in a test for cocaine.

On the website it states:
"False elevations of urinary catecholamine levels may occur due to interference with the fluorescence test."

Some experts believe that tests such as the GCMS test are better as they are prone to being more reliable in urine testing.

Although the drug can be used successfully to treat many conditions including syphilis, some side effects have also been reported. These include:

• Interference with tooth development in the last stages of pregnancy and early years up until around the age of eight. If taking the drug at these times, it could end up causing permanent discoloration of the teeth.  It can also cause Enamel Hypoplasia.

• In some people, it can cause Clostridium difficile associated diarrhea (CDAD). This can become very serious and could even be fatal.

• During pregnancy, it could cause problems in the placenta and can have toxic effects on the fetus including problems with the development of the skeleton.

Although there are some problems with the drug, your doctor would not prescribe it if you were going to be put at any risk. If you are worried about it causing a false positive test, bring proof of your prescription from home and ensure those administering the test know you are taking the drug for health reasons.

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