A cannabis high can last up to 10 hours, depending on the amount you ingest, how you consume it, the THC content, your body weight and metabolism, whether you’ve eaten, and your tolerance level ...

In the United States, you can reach the poison center by calling 1-800-222-1222. You can call this number 24 hours a day. Stay on the line for further instructions.

“It tells your body it’s nighttime,” Grandner says. But it takes a little bit of time for your body to power down, the same way it does when you naturally start to feel sleepy before bed.