am former meth user. 3 yrs clean. hair test pos. both times 3wks. apart. 2nd w/ 1500ppms less . why pos.?

Question

I have hep.c & 2 cysct on my liver. i was on interferon w/ good results 3 yrs ago. in 2 yrs i have had urine test & 5 of them were pos also for meth. but when sent to lab for further test were neg.. the mmp amnt. in hair was 2400 mmps.on 1st test. 2nd test 3wks later 1054. this raised brows from med. examiner. he doesnt know what could cause the dramatic drop so soon. could my liver be releasing drugs that i have uused so heavily before 3 yrs ago. i read something abount this,along time ago but can not remember where.Please help me to releive my mind.

Answer 1

By any chance do you take pseudoephedrine for allergies? This can produce false positives for methamphetamine in drug tests. Other allergy medicines can possibly do the same, since some drug tests search for drug metabolites in addition to the drug itself.

http://www.passyourdrugtest.com/false-positives.htm

Answer 2

THIS HAS TO DO WITH THE LEVEL OF METH YOU TOOK AT DIFFERENT STAGES OF YOUR HAIR GROWTH. SEE INFO
http://www.erowid.org/chemicals/meth/meth_testing.shtml