I am a very infrequent smoker, and the last time I smoked was the beginning of the month. It will be 4 weeks to my drug test. I will be taking a urine and a blood test. I am wondering if I will pass the test? The last time I smoked before that was the previous month. So in total I have smoked twice in 2 months. I am 6'1 and 195 and good shape work out at least 3 times a week.

Also how accurate are take home drug tests?

Thank you for your help

Extended detection times for THC apply to frequent smokers, usually defined as 3+ times per week. For infrequent smokers such as the once monthly that you indicate elimination time is much shorter. You should be entirely safe at 4 weeks.*

OTC drug tests vary in accuracy by manufacturer. Each must be registered with FDA and receive a waiver. So get the name and you can check it on-line. Here: CLIA waived tests (http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfClia/testswaived.cfm)

The tests use the same principle antigen-antibody as laboratory instrumental immunoassays so have an error rate of about 15%

Ref:
Musshoff & Madea, Table 1, p. 158 (http://norml.org/pdf_files/Review_biologic_matrices_indicators_cannabis_use.p df)

Extended detection times for THC apply to frequent smokers, usually defined as 3+ times per week. For infrequent smokers such as the once monthly that you indicate elimination time is much shorter. You should be entirely safe at 4 weeks.

OTC drug tests vary in accuracy by manufacturer. Each must be registered with FDA and receive a waiver. so get the name and you can check it on-line. Here: Medical Devices (http://www.fda.gov/MedicalDevices/default.htm)

The tests use the same principle antigen-antibody as laboratory instrumental immunoassays so have an error rate of about 15%


Thank you for your answer!

I also took a Check First home drug test and it came up with a negative result. So I should be in the clear right?

Thank you for your answer!

I also took a Check First home drug test and it came up with a negative result. So I should be in the clear right?

Should be!

I added a reference to the post above that provides some time lines in support of my statement.

Should be!

I added a reference to the post above that provides some time lines in support of my statement.

My concern is the Blood Test. I have read many time tables and would like to know your thoughts

Thank you

The blood test is of no concern. If there was THC in blood it would appear in urine. You will not have any systemic THC at that time. So the matrix tested is of no concern.

The blood test is of no concern. If there was THC in blood it would appear in urine. You will not have any systemic THC at that time period. So the matrix tested is of no concern.

Thank you!

I know I probably should stop reading things, but it said something about there being a difference of THC metabolites being tested. Is there a difference?

Thank you for all your help

When cannabis is smoked it immediately enters the blood stream. THC is metabolized, or broken down, into various elements. The first step is THC in the blood becomes 11-OH-THC (11-hydroxy-9-tetrahydrocannabinol). This metabolite is still psychoactive but is further oxidized to THC-COOH (11-nor-9-carboxy-delta 9-tetrahydrocannabinol). In humans, more than 100 metabolites have been identified but these are believed to be most active.

The initial screen for cannabinoids picks up on THC and THC-COOH but probably cross-reacts with a number of other metabolites like CBN or CBD.

These all derive from THC > THC-COOH. Once they are eliminated no more concern.

There aren't any dark secret processes looming in the laboratory. The test is standardized for specific metabolites and if those are not present in an amount in excess of 50 ng/mL (urine) then the result is negative.

When cannabis is smoked it immediately enters the blood stream. THC is metabolized, or broken down, into various elements. The first step is THC in the blood becomes 11-OH-THC (11-hydroxy-9-tetrahydrocannabinol). This metabolite is still psychoactive but is further oxidized to THC-COOH (11-nor-9-carboxy-delta 9-tetrahydrocannabinol). In humans, more than 100 metabolites have been identified but these are believed to be most active.

The initial screen for cannabinoids picks up on THC and THC-COOH but probably cross-reacts with a number of other metabolites like CBN or CBD.

These all derive from THC > THC-COOH. Once they are eliminated no more concern.

There aren't any dark secret processes looming in the laboratory. The test is standardized for specific metabolites and if those are not present in an amount in excess of 50 ng/mL (urine) then the result is negative.


Thank you for that breakdown.

Is there anything else I could keep doing to help my body keep breaking down any toxin in my body? I have about 10 days till my test, and I have a negative home drug test.