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The cough suppressant, DXM, has been known to cause a false positive for PCP. PCP, or phencyclidine, is also commonly known as angel dust.

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9y ago
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15y ago

The test could get contaminated from someone else's test if the people giving it aren't careful.

you're a f******idiot.

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10y ago

can methadone cause false positive for pcp

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Q: What causes a false positive for PCP?
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