Nicotine is considered a drug as we all know. Be aware if you are taking any of these medications with a higher reported incidence of hallucinations combined with vaping liquids with nicotine. There is a higher chance of hallucination occurring. Talk with your doctors about regulating your meds.
http://www.ehealthme.com/symptom/hallucination
http://www.ehealthme.com/symptom/hallucination