Answer
Yes, efavirenz/emtricitabine/tenofovir disoproxil maleate can cause false-positive urine cannabinoid results with some screening assays because of its efavirenz component; confirmation using a more specific method, such as gas chromatography/mass spectrometry, is recommended.
Sources for this answer
- Efavirenz/Emtricitabine/Tenofovir Disoproxil Mylan 600 mg/200 mg/245 mg Film-coated TabletsViatris (formerly Mylan or Upjohn) · emc · SmPC §4.5 Interaction with other medicinal products · Version 16Document updated
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