False-Positive Urine Screening for Benzodiazepines: An Association with Sertraline? PMC

False-Positive Urine Screening for Benzodiazepines: An Association with Sertraline? PMC

When she is not managing her business, Colonial Stores, Lisa spends most of her time researching about synthetic urine products to review. She loves sharing her learnings in a form of blogging that’s why she built a website to connect with many people. It is believed that she became addicted to cyclobenzaprine as a way to take the edge off of physical stresses caused by cocaine abuse.

  • If you have been using Flexeril for a prolonged period and suddenly stop, you may experience a general sense of malaise along with headaches and nausea.
  • They will have all the information you need to get started on the road to recovery.
  • The half-life of cyclobenzaprine can be as short as eight hours and as long as 37 hours.
  • For instance, a person may be seen as using cocaine when they’re not.
  • Suddenly stopping cyclobenzaprine after an extended period of substance use can lead to withdrawal.
  • It can lead to cardiac arrest, a dangerous drop in blood pressure, or seizures.

Much like your urine, how long Flexeril stays detectable is based on the 18-hour half-life of the drug. You should assume it’s still in your blood for at least 4-5 days. Drug detection times Each drug varies in the amount of time it can be detected in the urine (Table 2).2 The detection time is primarily based on half-life and the presence of drug metabolites.

Apr Will Muscle Relaxers Show Up On A Drug Test?

The helpline at is available 24/7 to discuss the treatment needs of yourself or a loved one. Flexeril and other medications containing cyclobenzaprine are not controlled substances since they are not commonly abused. If you’re ready to put your Flexeril abuse in the past, flexeril pediatric dose call your local treatment center. They will have all the information you need to get started on the road to recovery. There are a number of reasons why you might be subjected to drug testing. Many workplaces drug test regularly, and others use drug screening in pre-employment scenarios.

Unless you are a known abuser of Flexeril, you probably won’t be tested for it. Most lab tests don’t look for this drug because it isn’t abused very commonly. Stopping use may bring about withdrawal symptoms, but they are mild compared to those linked to benzodiazepines. Hair tests generally show patterns of drug use over the 90-day period before the test. Evidence of a drug can be visible about a week after ingestion when there is new hair growth. Cyclobenzaprine has an average elimination half-life of 18 hours.

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18 hours is the effective half-life of Cyclobenzaprine, and it is known to be eliminated quite slowly from the body. Keep in mind, though, that Flexeril half-life can be as low as 7 hours and as high as 37 hours, depending on the formulation. All Addiction Resource content is medically reviewed or fact checked to ensure as much factual accuracy as possible.

Your doctor can help you come up with a plan to taper your Flexeril. Tapering the medication gradually can make it easier to come off it entirely. When you don’t taper, you might fail to come off the medication in time to detox. The drug doesn’t cause withdrawal when you take it as directed.


The DEA has found that most abusers of Flexeril take it with some other sort of drugs such as alcohol, opioids, and benzos, which are the most dangerous possible combinations. It takes a large dosage to overdose on Flexeril, but that doesn’t mean it’s impossible. As a central nervous system depressant, Flexeril can cause respiratory and cardiac arrest if taken in large quantities. Users have also experienced a dangerous drop in blood pressure. Users should also avoid operating any machinery as the drug is known to induce intense feelings of drowsiness. Flexeril’s muscle relaxing properties give the user a specific kind of high.

Additionally, it is important to note which opioids are included on an institution’s standard screening, as certain opioids may require an additional order or GC-MS. I had been prescribed this drug for back pain and to help with muscle spasms. It is a very powerful muscle relaxer, and it works quite well. It occurred to me that it might work even better if I used a little more than I normally would. I waited until I had a couple of days when I would be at home, by myself. When I only took Flexeril 10mg, it produced a type of “hangover” effect the next day.

The professionals at detoxification or rehab centers are equipped to deal with the withdrawal process and can help you recover. It is almost impossible to force your body to make the detox process faster. Many companies sell detox kits and aids for this purpose, but using them can be dangerous.

Which substances are tested?

But some sources suggest the drug can be found up to around 36 hours after consumption. Has been contributing to medical fields including mental health and addiction since she retired from medicine; with over 19 years of practicing clinical experience. If you’re getting a random swab test for work, then Flexeril won’t be on the panel. Like blood testing, saliva tests could be used if you end up in a workplace accident while on Flexeril.

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