How Long Does Ativan Stay in Your System?

Detection Timetable Depends on Many Variables

Woman Taking Pill
Ativan Can Be Detected in Hair for 90 Days. © Getty Images

Determining exactly how long Ativan is detectable in the body depends on many variables, including which kind of drug test is being used. Ativan - also known as Benzodiazepine, Lorazepam, L-Lorazepam Acetate, O-Chlorooxazepam, O-Chloroxazepam - can be detected for a shorter time with some tests, but can be "visible" for up to three months in other tests.

The timetable for detecting Ativan in the system is also dependent upon each individual's metabolism, body mass, age, hydration level, physical activity, health conditions and other factors, making it almost impossible to determine an exact time Ativan will show up on a drug test.

Ativan Drug Tests Timetable

The following is an estimated range of times, or detection windows, during which Ativan and other drugs in this category of benzodiazepines can be detected by various testing methods:

Urine Test: 1-6 weeks
Blood Test: 6-48 hours`
Saliva Test: 1-10 days

Ativan, like many other drugs, can be detected with a hair follicle drug test for up to 90 days.

Time Depends on the Amount Taken

The length of time that Ativan can be detected in the body depends largely on the amount of the drug that the user has taken. The larger the dosage and the longer the drug has been used, the longer it can be detected with a drug test.

When taken as prescribed, the therapeutic dosage for Ativan ranges from 1 mg to 10 mg a day. But, when someone is abusing the drug for nonmedical purposes, they might take even higher dosages.

Even at small doses, Ativan can be found in a urine test for at least a week.

However, if someone has been using the drug at higher doses over a long period of time, it can be detected in a routine urine test for up to a month or sometimes even 45 days.

At normal dosages, Ativan can be detected in a blood test for about 48 hours, but if taken at higher dosages over a long period of time, it can be found in blood tests up to several days.

Because they are expensive, hair tests for Ativan are rarely used in routine testing situations, but when hair tests are used, they can detect Ativan use for up to 90 days.

Dangers of Ativan in the System

Ativan (lorazepam) is a benzodiazepine and a central nervous system depressant. Therefore, when combined with other depressants or combined with alcohol, it can present the possibility of fatal respiratory depression.

Therefore, it is important to know how long Ativan remains in the system, to avoid negative drug interactions.


Always Test Clean. "What Are Drug Detection Times?" Drug Test Facts Accessed June 2015

American Association for Clinical Chemistry "Drugs of Abuse Testing." Lab Tests Online. Revised 2 January 2013.

LabCorp, Inc. "Drugs of Abuse Reference Guide." Accessed March 2013.

U.S. National Library of Medicine. "Temazepam." Drugs, Herbs and Supplements February 2011

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