No, there's nothing unconstitutional about a VOLUNTARY drug test. Read the consent form you signed. You consented.

If you took a job where you CONSENTED to random drug testing, it was your choice. You could have looked elsewhere for another job. You could take some classes and get other kind of work. It's your choice. Or ... you could move to California where the state protects you.

Unless you're involved in an accident and you have a DOT CDL, Coast Guard or FAA pilot's license, or are a trainman ... where a judge can ORDER an involuntary test, your drug test is entirely voluntary. I've turned down job offers because a drug test was required. That was my choice.

The last resort is to be self-employed. It would be silly to make yourself take a drug test if you worked for yourself, wouldn't it? You could deduct the cost on Schedule C, but it would still be silly, right? If you think you can't find income without taking a drug test and it's a problem for you, then you probably need to improve your education or learn a new skill. Every year millions of people leave the corporate treadmill and become self-employed. Check out your local community college and get some free or cheap job training.

If more people simply refused drug tests instead of giving them fake urine or using an adulterant, probably fewer employers would do it. Hint. Look for the smaller employers, not the mega-corporations. Drug tests cost money and many smaller companies won't want to pay for them.