Can drugs be in jelly shots?

As someone who works in the substance abuse field, I would warn you that if you even have to ask if someone has put something into a drink, shot etc. without telling you, then you should not consume it. There are some sick people out there who put additional drugs (usually more addictive ones) into marijuana or other illegal drugs in order to increase the chance that the user will crave (and buy) more of the drug. I have also heard of "club drugs" such as ecstacy being mixed into drinks. This can be very dangerous and complicates emergency medical care in the event of a bad reaction because the doctor trying to take care of you doesn't have accurate information about what you really took. Lets not forget "date rape" drugs which can be added to drinks without effecting the taste at all. Be careful!