No. It does not contain anything a 5 panel test would pick up (Opiates, LSD, Benzodiazepines, Barbiturates, Stimulants). You're safe with Lidocaine, as it isn't in any of those drug categories. However, heavy, long-term use may cause the drug to start to accumulate in body tissues, allowing certain tests to detect the drug in the system for an extended period of time. For example, after a single use of cocaine, agents created by the metabolization of the drug can be detected in a person’s urine for 2-4 days. The clinical effect should be completely gone in two hours; although the essays will probably still detect the drug, it is not done in practical settings. i want to know after given an injection or two of lidocaine how long dose it stay in the human body not how long it works to numb pain Submitted: 11 years ago. Category: Health Clinical effectiveness of lidocaine lasts between 1 1/2 to two hours depending on the half-life, according to Drugs.com. The half-life of lidocaine can double and last between three and four hours for patients with liver dysfunction. How long does cocaine stay in your blood? A single dose of cocaine can be detected in the blood as soon as even after a few minutes from intake to around five to 6 hours later. Benzoylecgonine has a half-life of around 6 to 7 hours. If I only used one Lidoderm patch Lidocaine patch 5% how long does that stay in my system? Asked 20 Feb 2013 by robertjada Updated 20 February 2013 Lidoderm Lidocaine Spot 5 various% features 800 milligram involving Lidocaine within just about every plot. Lidocaine is usually a distant family member connected with Cocain and will provide a Mistaken Beneficial on a urinalysis or perhaps medicine monitor. The lidocaine patch is used for numerous reasons, for exampleneuralgia due to shingles. A new patch needs to be applied everytwelve hours to avoid skin irritation. Answers from experts on how long does lidocaine stay in your system. First: Why are there so many questions like this on health tap? This is a controlled anesthesia drug! very dangerous in untrained hands. Sedation in normal doses last 1-2 hours. In your system much longer..