A member asked:

Will a drop of menstrual blood in clean urine test positive for marijuana if the person on their period uses marijuana?

7 doctors weighed in across 3 answers

Yes: But thc appears in the urine so you're likely to test positive anyway.

Answered 10/26/2012

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Marijuana: It doesn't matter if woman is on her period or nor while testing for marijuna in urine, in other words if woman has used marijuana it will be positive in urine even if she is on her period.

Answered 1/31/2018

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Dr. Carla Enriquez answered

Specializes in Pediatrics

Makes no difference : The urine will show marijuana metabolites whether or not there is menstrual blood n the specimen.

Answered 2/15/2020

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