The presence of nicotine in blood can be a sign that the individual smokes. There are some blood tests that measure cotinine, a chemical produced from nicotine in the body, instead of nicotine. Hydroxychloroquine and cyclobenzaprine Is plaquenil used to treat vasculitis This test measures the amount of cotinine in your urine. Cotinine is a chemical your body makes after you are exposed to nicotine. Measuring cotinine is better than measuring nicotine because nicotine disappears from your system within a few hours, but cotinine remains for a day or more. You may. Jul 23, 2012 Reasons for false nicotine positives There can be a number of reasons why an individual can test positive for a nicotine blood test. Reasons range from diet to other medications to environment to human errors in labs. Some details about why your blood test may throw up a false positive are given below. Nicotine Test - Cotinine Test - Smoker's Nicotine Testing. Nicotine, which is the main drug in tobacco products, is the number one used drug in the U. S. Many people do not consider nicotine to be a drug, however it is. Nicotine is highly addictive and has the properties of both a stimulant and a sedative. Reasons for false nicotine positives There can be a number of reasons why an individual can test positive for a nicotine blood test. Some blood tests measure the level of nicotine or cotinine in the blood while some other tests give a positive or negative report according to some predetermined levels for these chemicals in blood. Can plaquenil cause a positive nicotine urine test Plaquenil effect urine - Answers on HealthTap, Reasons for False Positives on Nicotine Test When was chloroquine discoveredChloroquine injection medicationChloroquine proguanil antimalarial Cotinine urine test, nicotine urine test This test measures the amount of cotinine in your urine. Cotinine is a chemical your body makes after you are exposed to nicotine. You may have this test to measure your progress in a program to quit smoking. Nicotine Cotinine Urine - Health Encyclopedia.. Nicotine Test - Cotinine Test - Smoker's Nicotine Testing. Nicotine Testing What to Expect. Nowadays, there are 4 types of nicotine drug test which includes saliva, blood, urine, and hair drug test. Each of them shows different result but still have the same evaluation of the individual’s smoking level. Let’s see what nicotine drug test show you the amount of nicotine and cotinine in your body if you are a secondhand smoker. Hydroxychloroquine - I believe this drug causes false positive drug test of THC? Asked by Boni6258 Updated 6 January 2018 Topics chloroquine, hydroxychloroquine, drug test, medication The test was repeated and the result was the same! I've been doing a lot of research to see what could cause a false positive, and have read that certain foods in large quantities almonds, mustard, broccoli, tomatoes, potatoes could yield a false positive. but I've consumed none of those in large amounts. Can anyone shed any light?