TBH if you only have found a single one this is a pointless exercise anyway. if you have found a load there may be domestic laws that you are legally obliged to hand them in to poison control or risk being pulled up on health and safety violations for hoarding potentially dangerous chemicals (these may vary from region to region in the USA).
There are plenty of pills filled with caffeine or other milder or simply inert (inactive) substances that resemble xtc-pills or party drugs which can be legally sold in USA and Europe; unless you are trying to sell them as drugs as in some countries you can be nicked for fraud! (no kidding; this happened in the UK during the mid 1990s and the dealers got almost as much prison as they would have for selling real ones)
even in early 1990s Europe when folk were more desparate (drugs weren’t as prolific as folk may think) we didn’t bother with stuff like this; although diverted pharms were relatively easy to identify or (more sensibly) kept in their original bottles/packaging.
there are easier ways of getting high nowadays.
