Most symptoms of "greening out" (imbibing too much cannabis) will dissipate within minutes to hours, with no lasting effects beyond a little grogginess. Give it some time and these feelings will eventually pass, trust us.
Also, contrary to what you may have heard, there have been zero reported cannabis overdose deaths in the history of ever, so despite how freaked out you may feel or how sweaty you get, you won't expire from excessive consumption. (Don't take that on as a challenge, just keep in mind that if you accidentally overdo it, you'll be OK in a while.)
2. Know your limits before consuming
If you can, try to prepare for your cannabis session according to your tolerance level. Consume with friends you know and are comfortable with, and don't feel pressured to consume more than you can handle. It's all well and good to make new friends, but being surrounded by strangers when you can’t feel your face is unpleasant at best and anxiety-ridden at worst.
Take it slow, especially when consuming edibles. We recommend trying a standard dose of 10mg (or even 5mg if you really want to ease into the experience) and waiting at least an hour, if not two, before increasing your edibles dosage. The same goes for inhalation methods -- if you're used to occasionally taking one hit off your personal vaporizer, we don't advise sitting in a smoking circle puffing and passing for an hour.