How long do drugs stay in your system?

Information below is courtesy of www.drugs.ie/drugs_info/about_drugs/how_long_do_drugs_stay_in_your_system/
and should be considered as a guide only

Drug detection factors

The length of time that a drug is detectable in the system depends on a variety of factors, including:
  • the type of test
  • dose
  • tolerance
  • potency
  • metabolism
  • the existence of medical conditions​

Drug detection in hair

Drugs or their metabolites may be detectable in hair. Hair grows at a rate of approximately 1cm per month so depending on the length of hair it may be possible to determine drug use over recent months.

Drug detection times

  • Alcohol: 3-5 days in urine, 10-12 hours in blood
  • Amphetamines: 1-3 days in urine and around 12 hours in blood
  • Barbiturates: 2-4 days in urine and 1-2 days in blood
  • Benzodiazepines: 3-6 weeks in urine and 2-3 days in blood
  • Cannabis: 7-30 days in urine and up to 2 weeks in blood
  • Cocaine: 3-4 days in urine and 1-2 days in blood
  • Codeine: 1 day in urine and up to 12 hours in blood
  • Heroin: 3-4 days in urine and up to 12 hours in blood
  • LSD: 1-3 days in urine and up to 2-3 hours in blood
  • MDMA (ecstasy): 3-4 days in urine and 1-2 days in blood
  • Methamphetamine (crystal meth): 3-6 days in urine and 24 - 72 hours in blood
  • Methadone: 3-4 days in urine and 24-36 hours in blood
  • Morphine: 2-3 days in urine and 6-8 hours in blood
How long does marijuana stay in saliva?
salivafacts.blogspot.com/2017/03/how-long-does-marijuana-stay-in-saliva.html

Saliva tests can easily detect marijuana within 24 hours after intake. They are particularly good at detecting recent cases of marijuana use. Given that a more sensitive test is taken in a laboratory environment, it can detect THC during up to 72 hours. In case of chronic intake of weed, the test sometimes may be positive even after a week. 

Different factors impact the period required to remove THC remnants from the saliva. They are:
  • Body mass          
  • Physical activity                           
  • Amount of marijuana smoked
  • Age                       
  • Overall health condition            
  • Potency of product
  • Metabolic rate   
  • Individual drug tolerance​
​
What happens if I am caught?
The potential consequences of criminal conviction for you, and your loved ones, can be devastating; threatening your reputation, employment, relationships, and livelihood.

Whether you are challenging an allegation, pleading guilty, or simply not sure what to do, getting legal advice and assistance as soon as possible is absolutely critical. Head here for more information on how to get legal help.