Nope. Getting into a clinical trial can be just as hard as getting a real job, partly because you are going up against people who actually do clinical trials as their real job. In the business, they're called guinea piggers (except at Christmas dinner, when they presumably say they're waiters or something), and their numbers are in the thousands. This means that more often than not, applying for a trial forces you to compete against a gaggle of people whose resumes list their special skills as "metabolizing drugs and disregarding personal health for money."
These are the sort of folks who travel around the country doing the clinical trial circuit, calmly signing up for all kinds of research -- including tests that require them to spend weeks in a lab. They also follow a strict dietary regimen and abstain from alcohol and any drugs that could create a reaction with whatever mystery chemical they're ingesting next. Though even then, these uber-subjects might not qualify for reasons as obscure as, say, being the wrong size.
"Sadly, our shrinking potion has rendered you ineligible to test the antidote."