research into taking medication

is there anyone who takes medication on a regular basis? i am a student at the university of leeds. I study product design and for my final project i am designing a pill dispenser. would anyone feel comfortable answering a questionnaire i have designed towards people who take regular medication?
any help would be great
thanks

[hippo]

i have a.i.h. auto immune hepatitis,i came up positive for cocaine on a random drug screen,i work for the railroad,my primary doctor suggested to get a hair follicle test it came back negative,somehow both urine test and hair screen done at same lab,but railroad fired me anyway.railroad would not accept hair follicle,f.r.a. and d.o.t. don,t reconize hair screen,i don't do drugs!how is a person soppose to prove there innocent when they won't except evidence backed by my three forensic toxacolagist.i worked 16 years and 6 months for this railroad.can any medications cause a false positive and can liver disease,urine flow or my medications,prednisone 10mg.,azathioprine 100mg.,folic acid 2mg.,actonel 35mg.,anything cause a false positive??????  need help,hippo.

[KjFlicka]

I have had false positive for a drug test due to it being too diluted as if I was trying to cover something. The water pills I take for my liver disease caused this.... Lasix and the such.