Not only should you, but you should do a Search on my username once a day and read every single brilliant bon mot that comes out of my keyboard. 
(Yeah, too much oxycontin or morphine or vicodin or dilaudid or other opioid painkiller = no more breathing. Although, yeah, you probably won’t be feeling any pain, either.)
My guess is that they’re custom M&Ms left over from someone’s 40th birthday party.
If it were 40mg of oxycodone, you’d most likely spend your night vomiting violently. Unless you have a tolerance.
Here’s a site that can help identify what they are, if it matters.
I tried a few of the ones I have around and got the correct answers.