Oh, forgot to mention: after all these years, discovered I can get someone else (my daughter in this case) to take to the lab my urine sample (in appropriate container) together with the doctors requisition! I asked the lab about this one day when didn't feel well enough to take in myself and was told it is acceptable, , and visiting nurse said they often will take in a home-patient's sample when the patient is unable to take it in themselves... what a relief, as taking in myself sometimes entailed taking a taxi and long wait for "my turn." I am not sure if this would include samples for drug testing, but I think that's a different type of lab anyway??
Just wanted to pass along in case your local lab would allow this, if you are interested.... saves a lot of time and energy. and we can use our own clean bathrooms.. also frees up the lab's bathroom for someone else!