Gabapentin is commonly used to treat nerve pain (neuropathic pain) and certain types of seizures. It can also be prescribed for conditions like restless leg syndrome and fibromyalgia.
None of the prescription medication your are taking for (Gammapentin or Neurontin) neuropathy, (Celexa & Wellbutrin) depression/anxiety, (Seriquel) sleep issues/Bipolar and/or manic depression nor Visteril (for your allergies) are even close chemically or structurally to Cocaine Hydrochloride (Alkaline salt powder form, chemical name- Benzylmethyl Ecognine) or the base molecule Cocaine Sulfate aka crack cocaine. None of them even work on the same pathways and receptors that cocaine effects. Cocaine is considered one of if not the most powerful central nervous system (CNS) stimulant around. The drugs you take range from a vasoconstrictor for sinuses/allergy relief to SSRI's (select serotonin re-uptake inhibitors) to an old antipsychotic for the 1960's that is now being prescribed for a variety of treatments ranging from a sleep aid to depression to a non-narcotic tranquilizer. it is scientifically impossible for one or any combination of them to cause a false positive on a drug test, be it a chemical test stripe or a gas mass spectrometer.