Browse the WebMD Questions and Answers A-Z library for insights and advice for better health. Gabapentin, prescribed for epilepsy and nerve damage, is touted by federal health officials as an alternative to opioids for patients. But some are now abusing the drug. Drug Testing Certified Testing Centers for Drug Tests. Request A Test is your source for affordable drug testing. Whether your testing is for work, court-ordered, school or personal reasons, we make it easy and convenient to get tested. Ever heard weed lovers talk about using Sure Jell, aka Certo Pectin, to pass a marijuana drug test? Well, it’s a real thing, and after many trials, a lot of users believe that, if used correctly, Certo Pectin can help a person beat a marijuana drug test. Medical uses. Phenibut is used in Russia, Ukraine, and Latvia as a pharmaceutical drug to treat anxiety and to improve sleep (e.g., in the treatment of insomnia). Gabapentin, sold under the brand name Neurontin among others, is an anticonvulsant medication used to treat partial seizures, neuropathic pain, hot flashes, and restless legs syndrome. It will stay in your sytem for 1 day, and it is not a drug they test for. Take care. Gabapentin has an elimination half-life of 5 to 7 hours. Half life is the time it takes for your body to reduce blood levels by half. It takes around 5.5 x elimination half lives for a medicine to be excreted from ones system. The Bottomline. In conclusion, a false positive drug test does not mean you abuse drugs. It means you need to recheck your diet or medication. In any case, if the test is positive, the patient should consult the doctor and take another test to confirm. Gabapentin is approved by the Food and Drug Administration to treat epilepsy and pain related to nerve damage, called neuropathy. Also known by its brand name, Neurontin, the drug acts as a sedative.