Q: If a drug test is positive, can you determine how long ago the drug was taken and over what period of time?
A: No. Drug of abuse testing by blood, urine, or saliva can only detect whether or not a specific drug or drug metabolite is present at the time the test is performed. While there are very broad estimates (see chart above) as to how long a particular drug may have been in the system, no fluid based drug test, regardless of method, is intended to include a time variable. Many factors unique to the individual being tested determine the actual half-life of the particular drug including such variables as age, weight, sex, metabolic rate, overall health, amount of drug consumed over what period of time, etc. Therefore, no conclusions can be drawn as to when a particular drug was taken or how much was consumed with these types of drug of abuse tests. A forensic hair core analysis for drugs can be utilized to determine historical drug use up to 90 days. See the Hairconfirmâ„¢ forensic drug testing service.

Q: I am taking a prescription medication. Will this particular medication test positive on a drug test?
A: There are literally hundreds of brand name and generic drugs being prescribed today. If you have a question on a specific prescribed medication, you will need to know the general classification of that medication to determine if it will test positive on any of the specific drug test panels, ie: opiates, amphetamine, methamphetamine, benzodiazepines, barbiturates etc. For general classifications on prescription drugs you can either ask your pharmacist or go online to http://www.rxlist.com and enter the name of the prescription drug to determine it's general classification and pharmacology.
(from Craig Medical online).

Answered by ManAge : 49 1 month ago Edit Delete

Answered by Man 1 month ago