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A 47-year-old member asked:

how long do cocaine metabolites stay in your urine?

1 doctor answer5 doctors weighed in
Dr. Carlos Satulovsky
Psychiatry 28 years experience
Depends: The main metabolite is benzoilecognine, there is consensus that until 4-7 days (and even more when combined with marijuana use) is expected positive with most standardized methods. Of course lower tresholds will increase the time of detection. The more chronic heavy use, the more days it will take. The best way to pass a test is to stay clean. Stay clean. For more info: see comment below.
Dr. Carlos Satulovsky
Psychiatry 28 years experience
Provided original answer
Nov 10, 2013

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A 35-year-old member asked:

Should I be concerned if my urine is brown?

2 doctor answers4 doctors weighed in
Dr. Ruth Crystal
Obstetrics and Gynecology 27 years experience
Yes: Brownish urine may be concentrated meaning that you are not drinking enough water. However, i would recommend calling your doctor's office for a urinalysis to make sure that nothing else more serious is going on.
A 22-year-old member asked:

Should my baby's urine be dark yellow?

2 doctor answers4 doctors weighed in
Dr. Irwin Berkowitz
Specializes in Pediatrics
No: This suggests most likely that the urine is concentrated and the baby needs more fluids, particularly if the baby is otherwise doing well.
A 21-year-old member asked:

Must I use an acid washed jug for my 24-hour urine collection?

2 doctor answers5 doctors weighed in
Dr. Slade Suchecki
Family Medicine 18 years experience
Probably: The use depends on what you are looking for in the urine. This is commonly used for heavy metal testing.
A 21-year-old member asked:

What are the differences between cocaine and methylphenidate?

2 doctor answers3 doctors weighed in
Dr. Mary Ann Block
A Verified Doctoranswered
A US doctor answeredLearn more
Very little: Cocaine and methylphenidate are very much alike. They both go to the same receptor site in the brain and can cause the same symptoms when taken the same way. They are so much alike that they are used interchangeably in medical research.
A 45-year-old member asked:

How long does the metabolite for cocaine stay in urine?

1 doctor answer1 doctor weighed in
Dr. Julia Irwin
Psychiatry 26 years experience
cocaine + for days: Most drug screens will detect Cocaine for 2-4 days following use. With high doses used, it can be detected for as long as 22 days.

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Last updated Oct 20, 2017

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